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);
37 NFT_VALIDATE_SKIP = 0,
42 static struct rhltable nft_objname_ht;
44 static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
45 static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
46 static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
48 static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
49 static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
50 static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
52 static const struct rhashtable_params nft_chain_ht_params = {
53 .head_offset = offsetof(struct nft_chain, rhlhead),
54 .key_offset = offsetof(struct nft_chain, name),
55 .hashfn = nft_chain_hash,
56 .obj_hashfn = nft_chain_hash_obj,
57 .obj_cmpfn = nft_chain_hash_cmp,
58 .automatic_shrinking = true,
61 static const struct rhashtable_params nft_objname_ht_params = {
62 .head_offset = offsetof(struct nft_object, rhlhead),
63 .key_offset = offsetof(struct nft_object, key),
64 .hashfn = nft_objname_hash,
65 .obj_hashfn = nft_objname_hash_obj,
66 .obj_cmpfn = nft_objname_hash_cmp,
67 .automatic_shrinking = true,
70 struct nft_audit_data {
71 struct nft_table *table;
74 struct list_head list;
77 static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
78 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
79 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
80 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
81 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
82 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
83 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
84 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
85 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
86 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
87 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
88 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
89 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
90 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
91 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
92 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
93 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
94 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
95 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
96 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
97 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
99 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
100 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
101 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
102 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
105 static void nft_validate_state_update(struct nft_table *table, u8 new_validate_state)
107 switch (table->validate_state) {
108 case NFT_VALIDATE_SKIP:
109 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
111 case NFT_VALIDATE_NEED:
113 case NFT_VALIDATE_DO:
114 if (new_validate_state == NFT_VALIDATE_NEED)
118 table->validate_state = new_validate_state;
120 static void nf_tables_trans_destroy_work(struct work_struct *w);
121 static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
123 static void nft_ctx_init(struct nft_ctx *ctx,
125 const struct sk_buff *skb,
126 const struct nlmsghdr *nlh,
128 struct nft_table *table,
129 struct nft_chain *chain,
130 const struct nlattr * const *nla)
133 ctx->family = family;
138 ctx->portid = NETLINK_CB(skb).portid;
139 ctx->report = nlmsg_report(nlh);
140 ctx->flags = nlh->nlmsg_flags;
141 ctx->seq = nlh->nlmsg_seq;
144 static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
145 int msg_type, u32 size, gfp_t gfp)
147 struct nft_trans *trans;
149 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
153 INIT_LIST_HEAD(&trans->list);
154 trans->msg_type = msg_type;
160 static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
161 int msg_type, u32 size)
163 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
166 static void nft_trans_destroy(struct nft_trans *trans)
168 list_del(&trans->list);
172 static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
174 struct nftables_pernet *nft_net;
175 struct net *net = ctx->net;
176 struct nft_trans *trans;
178 if (!nft_set_is_anonymous(set))
181 nft_net = nft_pernet(net);
182 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
183 switch (trans->msg_type) {
185 if (nft_trans_set(trans) == set)
186 nft_trans_set_bound(trans) = true;
188 case NFT_MSG_NEWSETELEM:
189 if (nft_trans_elem_set(trans) == set)
190 nft_trans_elem_set_bound(trans) = true;
196 static int nft_netdev_register_hooks(struct net *net,
197 struct list_head *hook_list)
199 struct nft_hook *hook;
203 list_for_each_entry(hook, hook_list, list) {
204 err = nf_register_net_hook(net, &hook->ops);
213 list_for_each_entry(hook, hook_list, list) {
217 nf_unregister_net_hook(net, &hook->ops);
222 static void nft_netdev_unregister_hooks(struct net *net,
223 struct list_head *hook_list,
226 struct nft_hook *hook, *next;
228 list_for_each_entry_safe(hook, next, hook_list, list) {
229 nf_unregister_net_hook(net, &hook->ops);
230 if (release_netdev) {
231 list_del(&hook->list);
232 kfree_rcu(hook, rcu);
237 static int nf_tables_register_hook(struct net *net,
238 const struct nft_table *table,
239 struct nft_chain *chain)
241 struct nft_base_chain *basechain;
242 const struct nf_hook_ops *ops;
244 if (table->flags & NFT_TABLE_F_DORMANT ||
245 !nft_is_base_chain(chain))
248 basechain = nft_base_chain(chain);
249 ops = &basechain->ops;
251 if (basechain->type->ops_register)
252 return basechain->type->ops_register(net, ops);
254 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
255 return nft_netdev_register_hooks(net, &basechain->hook_list);
257 return nf_register_net_hook(net, &basechain->ops);
260 static void __nf_tables_unregister_hook(struct net *net,
261 const struct nft_table *table,
262 struct nft_chain *chain,
265 struct nft_base_chain *basechain;
266 const struct nf_hook_ops *ops;
268 if (table->flags & NFT_TABLE_F_DORMANT ||
269 !nft_is_base_chain(chain))
271 basechain = nft_base_chain(chain);
272 ops = &basechain->ops;
274 if (basechain->type->ops_unregister)
275 return basechain->type->ops_unregister(net, ops);
277 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
278 nft_netdev_unregister_hooks(net, &basechain->hook_list,
281 nf_unregister_net_hook(net, &basechain->ops);
284 static void nf_tables_unregister_hook(struct net *net,
285 const struct nft_table *table,
286 struct nft_chain *chain)
288 return __nf_tables_unregister_hook(net, table, chain, false);
291 static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
293 struct nftables_pernet *nft_net = nft_pernet(net);
295 list_add_tail(&trans->list, &nft_net->commit_list);
298 static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
300 struct nft_trans *trans;
302 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
306 if (msg_type == NFT_MSG_NEWTABLE)
307 nft_activate_next(ctx->net, ctx->table);
309 nft_trans_commit_list_add_tail(ctx->net, trans);
313 static int nft_deltable(struct nft_ctx *ctx)
317 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
321 nft_deactivate_next(ctx->net, ctx->table);
325 static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
327 struct nft_trans *trans;
329 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
331 return ERR_PTR(-ENOMEM);
333 if (msg_type == NFT_MSG_NEWCHAIN) {
334 nft_activate_next(ctx->net, ctx->chain);
336 if (ctx->nla[NFTA_CHAIN_ID]) {
337 nft_trans_chain_id(trans) =
338 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
342 nft_trans_commit_list_add_tail(ctx->net, trans);
346 static int nft_delchain(struct nft_ctx *ctx)
348 struct nft_trans *trans;
350 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
352 return PTR_ERR(trans);
355 nft_deactivate_next(ctx->net, ctx->chain);
360 static void nft_rule_expr_activate(const struct nft_ctx *ctx,
361 struct nft_rule *rule)
363 struct nft_expr *expr;
365 expr = nft_expr_first(rule);
366 while (nft_expr_more(rule, expr)) {
367 if (expr->ops->activate)
368 expr->ops->activate(ctx, expr);
370 expr = nft_expr_next(expr);
374 static void nft_rule_expr_deactivate(const struct nft_ctx *ctx,
375 struct nft_rule *rule,
376 enum nft_trans_phase phase)
378 struct nft_expr *expr;
380 expr = nft_expr_first(rule);
381 while (nft_expr_more(rule, expr)) {
382 if (expr->ops->deactivate)
383 expr->ops->deactivate(ctx, expr, phase);
385 expr = nft_expr_next(expr);
390 nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
392 /* You cannot delete the same rule twice */
393 if (nft_is_active_next(ctx->net, rule)) {
394 nft_deactivate_next(ctx->net, rule);
401 static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
402 struct nft_rule *rule)
404 struct nft_trans *trans;
406 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
410 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
411 nft_trans_rule_id(trans) =
412 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
414 nft_trans_rule(trans) = rule;
415 nft_trans_commit_list_add_tail(ctx->net, trans);
420 static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
422 struct nft_flow_rule *flow;
423 struct nft_trans *trans;
426 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
430 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
431 flow = nft_flow_rule_create(ctx->net, rule);
433 nft_trans_destroy(trans);
434 return PTR_ERR(flow);
437 nft_trans_flow_rule(trans) = flow;
440 err = nf_tables_delrule_deactivate(ctx, rule);
442 nft_trans_destroy(trans);
445 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
450 static int nft_delrule_by_chain(struct nft_ctx *ctx)
452 struct nft_rule *rule;
455 list_for_each_entry(rule, &ctx->chain->rules, list) {
456 if (!nft_is_active_next(ctx->net, rule))
459 err = nft_delrule(ctx, rule);
466 static int __nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
468 const struct nft_set_desc *desc)
470 struct nft_trans *trans;
472 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
476 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] && !desc) {
477 nft_trans_set_id(trans) =
478 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
479 nft_activate_next(ctx->net, set);
481 nft_trans_set(trans) = set;
483 nft_trans_set_update(trans) = true;
484 nft_trans_set_gc_int(trans) = desc->gc_int;
485 nft_trans_set_timeout(trans) = desc->timeout;
487 nft_trans_commit_list_add_tail(ctx->net, trans);
492 static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
495 return __nft_trans_set_add(ctx, msg_type, set, NULL);
498 static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
502 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
506 nft_deactivate_next(ctx->net, set);
512 static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
513 struct nft_object *obj)
515 struct nft_trans *trans;
517 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
521 if (msg_type == NFT_MSG_NEWOBJ)
522 nft_activate_next(ctx->net, obj);
524 nft_trans_obj(trans) = obj;
525 nft_trans_commit_list_add_tail(ctx->net, trans);
530 static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
534 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
538 nft_deactivate_next(ctx->net, obj);
544 static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
545 struct nft_flowtable *flowtable)
547 struct nft_trans *trans;
549 trans = nft_trans_alloc(ctx, msg_type,
550 sizeof(struct nft_trans_flowtable));
554 if (msg_type == NFT_MSG_NEWFLOWTABLE)
555 nft_activate_next(ctx->net, flowtable);
557 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
558 nft_trans_flowtable(trans) = flowtable;
559 nft_trans_commit_list_add_tail(ctx->net, trans);
564 static int nft_delflowtable(struct nft_ctx *ctx,
565 struct nft_flowtable *flowtable)
569 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
573 nft_deactivate_next(ctx->net, flowtable);
579 static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
583 for (i = track->regs[dreg].num_reg; i > 0; i--)
584 __nft_reg_track_cancel(track, dreg - i);
587 static void __nft_reg_track_update(struct nft_regs_track *track,
588 const struct nft_expr *expr,
591 track->regs[dreg].selector = expr;
592 track->regs[dreg].bitwise = NULL;
593 track->regs[dreg].num_reg = num_reg;
596 void nft_reg_track_update(struct nft_regs_track *track,
597 const struct nft_expr *expr, u8 dreg, u8 len)
599 unsigned int regcount;
602 __nft_reg_track_clobber(track, dreg);
604 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
605 for (i = 0; i < regcount; i++, dreg++)
606 __nft_reg_track_update(track, expr, dreg, i);
608 EXPORT_SYMBOL_GPL(nft_reg_track_update);
610 void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
612 unsigned int regcount;
615 __nft_reg_track_clobber(track, dreg);
617 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
618 for (i = 0; i < regcount; i++, dreg++)
619 __nft_reg_track_cancel(track, dreg);
621 EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
623 void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
625 track->regs[dreg].selector = NULL;
626 track->regs[dreg].bitwise = NULL;
627 track->regs[dreg].num_reg = 0;
629 EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
635 static struct nft_table *nft_table_lookup(const struct net *net,
636 const struct nlattr *nla,
637 u8 family, u8 genmask, u32 nlpid)
639 struct nftables_pernet *nft_net;
640 struct nft_table *table;
643 return ERR_PTR(-EINVAL);
645 nft_net = nft_pernet(net);
646 list_for_each_entry_rcu(table, &nft_net->tables, list,
647 lockdep_is_held(&nft_net->commit_mutex)) {
648 if (!nla_strcmp(nla, table->name) &&
649 table->family == family &&
650 nft_active_genmask(table, genmask)) {
651 if (nft_table_has_owner(table) &&
652 nlpid && table->nlpid != nlpid)
653 return ERR_PTR(-EPERM);
659 return ERR_PTR(-ENOENT);
662 static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
663 const struct nlattr *nla,
664 u8 genmask, u32 nlpid)
666 struct nftables_pernet *nft_net;
667 struct nft_table *table;
669 nft_net = nft_pernet(net);
670 list_for_each_entry(table, &nft_net->tables, list) {
671 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
672 nft_active_genmask(table, genmask)) {
673 if (nft_table_has_owner(table) &&
674 nlpid && table->nlpid != nlpid)
675 return ERR_PTR(-EPERM);
681 return ERR_PTR(-ENOENT);
684 static inline u64 nf_tables_alloc_handle(struct nft_table *table)
686 return ++table->hgenerator;
689 static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
691 static const struct nft_chain_type *
692 __nft_chain_type_get(u8 family, enum nft_chain_types type)
694 if (family >= NFPROTO_NUMPROTO ||
695 type >= NFT_CHAIN_T_MAX)
698 return chain_type[family][type];
701 static const struct nft_chain_type *
702 __nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
704 const struct nft_chain_type *type;
707 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
708 type = __nft_chain_type_get(family, i);
711 if (!nla_strcmp(nla, type->name))
717 struct nft_module_request {
718 struct list_head list;
719 char module[MODULE_NAME_LEN];
723 #ifdef CONFIG_MODULES
724 __printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
727 char module_name[MODULE_NAME_LEN];
728 struct nftables_pernet *nft_net;
729 struct nft_module_request *req;
734 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
736 if (ret >= MODULE_NAME_LEN)
739 nft_net = nft_pernet(net);
740 list_for_each_entry(req, &nft_net->module_list, list) {
741 if (!strcmp(req->module, module_name)) {
745 /* A request to load this module already exists. */
750 req = kmalloc(sizeof(*req), GFP_KERNEL);
755 strscpy(req->module, module_name, MODULE_NAME_LEN);
756 list_add_tail(&req->list, &nft_net->module_list);
760 EXPORT_SYMBOL_GPL(nft_request_module);
763 static void lockdep_nfnl_nft_mutex_not_held(void)
765 #ifdef CONFIG_PROVE_LOCKING
767 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
771 static const struct nft_chain_type *
772 nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
773 u8 family, bool autoload)
775 const struct nft_chain_type *type;
777 type = __nf_tables_chain_type_lookup(nla, family);
781 lockdep_nfnl_nft_mutex_not_held();
782 #ifdef CONFIG_MODULES
784 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
786 (const char *)nla_data(nla)) == -EAGAIN)
787 return ERR_PTR(-EAGAIN);
790 return ERR_PTR(-ENOENT);
793 static __be16 nft_base_seq(const struct net *net)
795 struct nftables_pernet *nft_net = nft_pernet(net);
797 return htons(nft_net->base_seq & 0xffff);
800 static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
801 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
802 .len = NFT_TABLE_MAXNAMELEN - 1 },
803 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
804 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
805 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
806 .len = NFT_USERDATA_MAXLEN }
809 static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
810 u32 portid, u32 seq, int event, u32 flags,
811 int family, const struct nft_table *table)
813 struct nlmsghdr *nlh;
815 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
816 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
817 NFNETLINK_V0, nft_base_seq(net));
819 goto nla_put_failure;
821 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
822 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
823 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
825 goto nla_put_failure;
827 if (event == NFT_MSG_DELTABLE) {
832 if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
833 htonl(table->flags & NFT_TABLE_F_MASK)))
834 goto nla_put_failure;
836 if (nft_table_has_owner(table) &&
837 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
838 goto nla_put_failure;
841 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
842 goto nla_put_failure;
849 nlmsg_trim(skb, nlh);
853 struct nftnl_skb_parms {
856 #define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
858 static void nft_notify_enqueue(struct sk_buff *skb, bool report,
859 struct list_head *notify_list)
861 NFT_CB(skb).report = report;
862 list_add_tail(&skb->list, notify_list);
865 static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
867 struct nftables_pernet *nft_net;
873 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
876 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
880 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
881 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
883 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
884 event, flags, ctx->family, ctx->table);
890 nft_net = nft_pernet(ctx->net);
891 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
894 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
897 static int nf_tables_dump_tables(struct sk_buff *skb,
898 struct netlink_callback *cb)
900 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
901 struct nftables_pernet *nft_net;
902 const struct nft_table *table;
903 unsigned int idx = 0, s_idx = cb->args[0];
904 struct net *net = sock_net(skb->sk);
905 int family = nfmsg->nfgen_family;
908 nft_net = nft_pernet(net);
909 cb->seq = READ_ONCE(nft_net->base_seq);
911 list_for_each_entry_rcu(table, &nft_net->tables, list) {
912 if (family != NFPROTO_UNSPEC && family != table->family)
918 memset(&cb->args[1], 0,
919 sizeof(cb->args) - sizeof(cb->args[0]));
920 if (!nft_is_active(net, table))
922 if (nf_tables_fill_table_info(skb, net,
923 NETLINK_CB(cb->skb).portid,
925 NFT_MSG_NEWTABLE, NLM_F_MULTI,
926 table->family, table) < 0)
929 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
939 static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
940 const struct nlmsghdr *nlh,
941 struct netlink_dump_control *c)
945 if (!try_module_get(THIS_MODULE))
949 err = netlink_dump_start(nlsk, skb, nlh, c);
951 module_put(THIS_MODULE);
956 /* called with rcu_read_lock held */
957 static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
958 const struct nlattr * const nla[])
960 struct netlink_ext_ack *extack = info->extack;
961 u8 genmask = nft_genmask_cur(info->net);
962 u8 family = info->nfmsg->nfgen_family;
963 const struct nft_table *table;
964 struct net *net = info->net;
965 struct sk_buff *skb2;
968 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
969 struct netlink_dump_control c = {
970 .dump = nf_tables_dump_tables,
971 .module = THIS_MODULE,
974 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
977 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
979 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
980 return PTR_ERR(table);
983 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
987 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
988 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
991 goto err_fill_table_info;
993 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
1000 static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
1002 struct nft_chain *chain;
1005 list_for_each_entry(chain, &table->chains, list) {
1006 if (!nft_is_active_next(net, chain))
1008 if (!nft_is_base_chain(chain))
1011 if (cnt && i++ == cnt)
1014 nf_tables_unregister_hook(net, table, chain);
1018 static int nf_tables_table_enable(struct net *net, struct nft_table *table)
1020 struct nft_chain *chain;
1023 list_for_each_entry(chain, &table->chains, list) {
1024 if (!nft_is_active_next(net, chain))
1026 if (!nft_is_base_chain(chain))
1029 err = nf_tables_register_hook(net, table, chain);
1031 goto err_register_hooks;
1039 nft_table_disable(net, table, i);
1043 static void nf_tables_table_disable(struct net *net, struct nft_table *table)
1045 table->flags &= ~NFT_TABLE_F_DORMANT;
1046 nft_table_disable(net, table, 0);
1047 table->flags |= NFT_TABLE_F_DORMANT;
1050 #define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1051 #define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1052 #define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1053 #define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1054 __NFT_TABLE_F_WAS_AWAKEN)
1056 static int nf_tables_updtable(struct nft_ctx *ctx)
1058 struct nft_trans *trans;
1062 if (!ctx->nla[NFTA_TABLE_FLAGS])
1065 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
1066 if (flags & ~NFT_TABLE_F_MASK)
1069 if (flags == ctx->table->flags)
1072 if ((nft_table_has_owner(ctx->table) &&
1073 !(flags & NFT_TABLE_F_OWNER)) ||
1074 (!nft_table_has_owner(ctx->table) &&
1075 flags & NFT_TABLE_F_OWNER))
1078 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1079 sizeof(struct nft_trans_table));
1083 if ((flags & NFT_TABLE_F_DORMANT) &&
1084 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
1085 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1086 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1087 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
1088 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1089 ctx->table->flags & NFT_TABLE_F_DORMANT) {
1090 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1091 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1092 ret = nf_tables_table_enable(ctx->net, ctx->table);
1094 goto err_register_hooks;
1096 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1100 nft_trans_table_update(trans) = true;
1101 nft_trans_commit_list_add_tail(ctx->net, trans);
1106 nft_trans_destroy(trans);
1110 static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1112 const char *name = data;
1114 return jhash(name, strlen(name), seed);
1117 static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1119 const struct nft_chain *chain = data;
1121 return nft_chain_hash(chain->name, 0, seed);
1124 static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1127 const struct nft_chain *chain = ptr;
1128 const char *name = arg->key;
1130 return strcmp(chain->name, name);
1133 static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1135 const struct nft_object_hash_key *k = data;
1137 seed ^= hash_ptr(k->table, 32);
1139 return jhash(k->name, strlen(k->name), seed);
1142 static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1144 const struct nft_object *obj = data;
1146 return nft_objname_hash(&obj->key, 0, seed);
1149 static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1152 const struct nft_object_hash_key *k = arg->key;
1153 const struct nft_object *obj = ptr;
1155 if (obj->key.table != k->table)
1158 return strcmp(obj->key.name, k->name);
1161 static bool nft_supported_family(u8 family)
1164 #ifdef CONFIG_NF_TABLES_INET
1165 || family == NFPROTO_INET
1167 #ifdef CONFIG_NF_TABLES_IPV4
1168 || family == NFPROTO_IPV4
1170 #ifdef CONFIG_NF_TABLES_ARP
1171 || family == NFPROTO_ARP
1173 #ifdef CONFIG_NF_TABLES_NETDEV
1174 || family == NFPROTO_NETDEV
1176 #if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1177 || family == NFPROTO_BRIDGE
1179 #ifdef CONFIG_NF_TABLES_IPV6
1180 || family == NFPROTO_IPV6
1185 static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1186 const struct nlattr * const nla[])
1188 struct nftables_pernet *nft_net = nft_pernet(info->net);
1189 struct netlink_ext_ack *extack = info->extack;
1190 u8 genmask = nft_genmask_next(info->net);
1191 u8 family = info->nfmsg->nfgen_family;
1192 struct net *net = info->net;
1193 const struct nlattr *attr;
1194 struct nft_table *table;
1199 if (!nft_supported_family(family))
1202 lockdep_assert_held(&nft_net->commit_mutex);
1203 attr = nla[NFTA_TABLE_NAME];
1204 table = nft_table_lookup(net, attr, family, genmask,
1205 NETLINK_CB(skb).portid);
1206 if (IS_ERR(table)) {
1207 if (PTR_ERR(table) != -ENOENT)
1208 return PTR_ERR(table);
1210 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
1211 NL_SET_BAD_ATTR(extack, attr);
1214 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
1217 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1219 return nf_tables_updtable(&ctx);
1222 if (nla[NFTA_TABLE_FLAGS]) {
1223 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
1224 if (flags & ~NFT_TABLE_F_MASK)
1229 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
1233 table->validate_state = NFT_VALIDATE_SKIP;
1234 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
1235 if (table->name == NULL)
1238 if (nla[NFTA_TABLE_USERDATA]) {
1239 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
1240 if (table->udata == NULL)
1241 goto err_table_udata;
1243 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
1246 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1250 INIT_LIST_HEAD(&table->chains);
1251 INIT_LIST_HEAD(&table->sets);
1252 INIT_LIST_HEAD(&table->objects);
1253 INIT_LIST_HEAD(&table->flowtables);
1254 table->family = family;
1255 table->flags = flags;
1256 table->handle = ++nft_net->table_handle;
1257 if (table->flags & NFT_TABLE_F_OWNER)
1258 table->nlpid = NETLINK_CB(skb).portid;
1260 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1261 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
1265 list_add_tail_rcu(&table->list, &nft_net->tables);
1268 rhltable_destroy(&table->chains_ht);
1270 kfree(table->udata);
1279 static int nft_flush_table(struct nft_ctx *ctx)
1281 struct nft_flowtable *flowtable, *nft;
1282 struct nft_chain *chain, *nc;
1283 struct nft_object *obj, *ne;
1284 struct nft_set *set, *ns;
1287 list_for_each_entry(chain, &ctx->table->chains, list) {
1288 if (!nft_is_active_next(ctx->net, chain))
1291 if (nft_chain_is_bound(chain))
1296 err = nft_delrule_by_chain(ctx);
1301 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
1302 if (!nft_is_active_next(ctx->net, set))
1305 if (nft_set_is_anonymous(set) &&
1306 !list_empty(&set->bindings))
1309 err = nft_delset(ctx, set);
1314 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
1315 if (!nft_is_active_next(ctx->net, flowtable))
1318 err = nft_delflowtable(ctx, flowtable);
1323 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
1324 if (!nft_is_active_next(ctx->net, obj))
1327 err = nft_delobj(ctx, obj);
1332 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
1333 if (!nft_is_active_next(ctx->net, chain))
1336 if (nft_chain_is_bound(chain))
1341 err = nft_delchain(ctx);
1346 err = nft_deltable(ctx);
1351 static int nft_flush(struct nft_ctx *ctx, int family)
1353 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
1354 const struct nlattr * const *nla = ctx->nla;
1355 struct nft_table *table, *nt;
1358 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
1359 if (family != AF_UNSPEC && table->family != family)
1362 ctx->family = table->family;
1364 if (!nft_is_active_next(ctx->net, table))
1367 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1370 if (nla[NFTA_TABLE_NAME] &&
1371 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1376 err = nft_flush_table(ctx);
1384 static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1385 const struct nlattr * const nla[])
1387 struct netlink_ext_ack *extack = info->extack;
1388 u8 genmask = nft_genmask_next(info->net);
1389 u8 family = info->nfmsg->nfgen_family;
1390 struct net *net = info->net;
1391 const struct nlattr *attr;
1392 struct nft_table *table;
1395 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
1396 if (family == AF_UNSPEC ||
1397 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
1398 return nft_flush(&ctx, family);
1400 if (nla[NFTA_TABLE_HANDLE]) {
1401 attr = nla[NFTA_TABLE_HANDLE];
1402 table = nft_table_lookup_byhandle(net, attr, genmask,
1403 NETLINK_CB(skb).portid);
1405 attr = nla[NFTA_TABLE_NAME];
1406 table = nft_table_lookup(net, attr, family, genmask,
1407 NETLINK_CB(skb).portid);
1410 if (IS_ERR(table)) {
1411 if (PTR_ERR(table) == -ENOENT &&
1412 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
1415 NL_SET_BAD_ATTR(extack, attr);
1416 return PTR_ERR(table);
1419 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
1423 ctx.family = family;
1426 return nft_flush_table(&ctx);
1429 static void nf_tables_table_destroy(struct nft_ctx *ctx)
1431 if (WARN_ON(ctx->table->use > 0))
1434 rhltable_destroy(&ctx->table->chains_ht);
1435 kfree(ctx->table->name);
1436 kfree(ctx->table->udata);
1440 void nft_register_chain_type(const struct nft_chain_type *ctype)
1442 nfnl_lock(NFNL_SUBSYS_NFTABLES);
1443 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
1444 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1447 chain_type[ctype->family][ctype->type] = ctype;
1448 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1450 EXPORT_SYMBOL_GPL(nft_register_chain_type);
1452 void nft_unregister_chain_type(const struct nft_chain_type *ctype)
1454 nfnl_lock(NFNL_SUBSYS_NFTABLES);
1455 chain_type[ctype->family][ctype->type] = NULL;
1456 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1458 EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
1464 static struct nft_chain *
1465 nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
1467 struct nft_chain *chain;
1469 list_for_each_entry(chain, &table->chains, list) {
1470 if (chain->handle == handle &&
1471 nft_active_genmask(chain, genmask))
1475 return ERR_PTR(-ENOENT);
1478 static bool lockdep_commit_lock_is_held(const struct net *net)
1480 #ifdef CONFIG_PROVE_LOCKING
1481 struct nftables_pernet *nft_net = nft_pernet(net);
1483 return lockdep_is_held(&nft_net->commit_mutex);
1489 static struct nft_chain *nft_chain_lookup(struct net *net,
1490 struct nft_table *table,
1491 const struct nlattr *nla, u8 genmask)
1493 char search[NFT_CHAIN_MAXNAMELEN + 1];
1494 struct rhlist_head *tmp, *list;
1495 struct nft_chain *chain;
1498 return ERR_PTR(-EINVAL);
1500 nla_strscpy(search, nla, sizeof(search));
1502 WARN_ON(!rcu_read_lock_held() &&
1503 !lockdep_commit_lock_is_held(net));
1505 chain = ERR_PTR(-ENOENT);
1507 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1511 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1512 if (nft_active_genmask(chain, genmask))
1515 chain = ERR_PTR(-ENOENT);
1521 static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
1522 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1523 .len = NFT_TABLE_MAXNAMELEN - 1 },
1524 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1525 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1526 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1527 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
1528 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
1529 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1530 .len = NFT_MODULE_AUTOLOAD_LIMIT },
1531 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
1532 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
1533 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
1534 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1535 .len = NFT_USERDATA_MAXLEN },
1538 static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1539 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1540 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
1541 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1542 .len = IFNAMSIZ - 1 },
1545 static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1547 struct nft_stats *cpu_stats, total;
1548 struct nlattr *nest;
1556 memset(&total, 0, sizeof(total));
1557 for_each_possible_cpu(cpu) {
1558 cpu_stats = per_cpu_ptr(stats, cpu);
1560 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
1561 pkts = cpu_stats->pkts;
1562 bytes = cpu_stats->bytes;
1563 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
1565 total.bytes += bytes;
1567 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
1569 goto nla_put_failure;
1571 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1572 NFTA_COUNTER_PAD) ||
1573 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1575 goto nla_put_failure;
1577 nla_nest_end(skb, nest);
1584 static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
1585 const struct nft_base_chain *basechain,
1586 const struct list_head *hook_list)
1588 const struct nf_hook_ops *ops = &basechain->ops;
1589 struct nft_hook *hook, *first = NULL;
1590 struct nlattr *nest, *nest_devs;
1593 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1595 goto nla_put_failure;
1596 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1597 goto nla_put_failure;
1598 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1599 goto nla_put_failure;
1601 if (nft_base_chain_netdev(family, ops->hooknum)) {
1602 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
1605 hook_list = &basechain->hook_list;
1607 list_for_each_entry(hook, hook_list, list) {
1611 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1612 hook->ops.dev->name))
1613 goto nla_put_failure;
1616 nla_nest_end(skb, nest_devs);
1619 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1620 goto nla_put_failure;
1622 nla_nest_end(skb, nest);
1629 static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1630 u32 portid, u32 seq, int event, u32 flags,
1631 int family, const struct nft_table *table,
1632 const struct nft_chain *chain,
1633 const struct list_head *hook_list)
1635 struct nlmsghdr *nlh;
1637 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
1638 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1639 NFNETLINK_V0, nft_base_seq(net));
1641 goto nla_put_failure;
1643 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name) ||
1644 nla_put_string(skb, NFTA_CHAIN_NAME, chain->name) ||
1645 nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
1647 goto nla_put_failure;
1649 if (event == NFT_MSG_DELCHAIN && !hook_list) {
1650 nlmsg_end(skb, nlh);
1654 if (nft_is_base_chain(chain)) {
1655 const struct nft_base_chain *basechain = nft_base_chain(chain);
1656 struct nft_stats __percpu *stats;
1658 if (nft_dump_basechain_hook(skb, family, basechain, hook_list))
1659 goto nla_put_failure;
1661 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1662 htonl(basechain->policy)))
1663 goto nla_put_failure;
1665 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1666 goto nla_put_failure;
1668 stats = rcu_dereference_check(basechain->stats,
1669 lockdep_commit_lock_is_held(net));
1670 if (nft_dump_stats(skb, stats))
1671 goto nla_put_failure;
1675 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1676 goto nla_put_failure;
1678 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1679 goto nla_put_failure;
1682 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1683 goto nla_put_failure;
1685 nlmsg_end(skb, nlh);
1689 nlmsg_trim(skb, nlh);
1693 static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event,
1694 const struct list_head *hook_list)
1696 struct nftables_pernet *nft_net;
1697 struct sk_buff *skb;
1702 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
1705 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1709 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1710 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1712 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
1713 event, flags, ctx->family, ctx->table,
1714 ctx->chain, hook_list);
1720 nft_net = nft_pernet(ctx->net);
1721 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
1724 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
1727 static int nf_tables_dump_chains(struct sk_buff *skb,
1728 struct netlink_callback *cb)
1730 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1731 unsigned int idx = 0, s_idx = cb->args[0];
1732 struct net *net = sock_net(skb->sk);
1733 int family = nfmsg->nfgen_family;
1734 struct nftables_pernet *nft_net;
1735 const struct nft_table *table;
1736 const struct nft_chain *chain;
1739 nft_net = nft_pernet(net);
1740 cb->seq = READ_ONCE(nft_net->base_seq);
1742 list_for_each_entry_rcu(table, &nft_net->tables, list) {
1743 if (family != NFPROTO_UNSPEC && family != table->family)
1746 list_for_each_entry_rcu(chain, &table->chains, list) {
1750 memset(&cb->args[1], 0,
1751 sizeof(cb->args) - sizeof(cb->args[0]));
1752 if (!nft_is_active(net, chain))
1754 if (nf_tables_fill_chain_info(skb, net,
1755 NETLINK_CB(cb->skb).portid,
1759 table->family, table,
1763 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1774 /* called with rcu_read_lock held */
1775 static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1776 const struct nlattr * const nla[])
1778 struct netlink_ext_ack *extack = info->extack;
1779 u8 genmask = nft_genmask_cur(info->net);
1780 u8 family = info->nfmsg->nfgen_family;
1781 const struct nft_chain *chain;
1782 struct net *net = info->net;
1783 struct nft_table *table;
1784 struct sk_buff *skb2;
1787 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
1788 struct netlink_dump_control c = {
1789 .dump = nf_tables_dump_chains,
1790 .module = THIS_MODULE,
1793 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
1796 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
1797 if (IS_ERR(table)) {
1798 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
1799 return PTR_ERR(table);
1802 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
1803 if (IS_ERR(chain)) {
1804 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
1805 return PTR_ERR(chain);
1808 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
1812 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
1813 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
1814 0, family, table, chain, NULL);
1816 goto err_fill_chain_info;
1818 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
1820 err_fill_chain_info:
1825 static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1826 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1827 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1830 static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
1832 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1833 struct nft_stats __percpu *newstats;
1834 struct nft_stats *stats;
1837 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1838 nft_counter_policy, NULL);
1840 return ERR_PTR(err);
1842 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
1843 return ERR_PTR(-EINVAL);
1845 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
1846 if (newstats == NULL)
1847 return ERR_PTR(-ENOMEM);
1849 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1850 * are not exposed to userspace.
1853 stats = this_cpu_ptr(newstats);
1854 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
1855 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
1861 static void nft_chain_stats_replace(struct nft_trans *trans)
1863 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
1865 if (!nft_trans_chain_stats(trans))
1868 nft_trans_chain_stats(trans) =
1869 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
1870 lockdep_commit_lock_is_held(trans->ctx.net));
1872 if (!nft_trans_chain_stats(trans))
1873 static_branch_inc(&nft_counters_enabled);
1876 static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
1878 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
1879 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
1885 /* should be NULL either via abort or via successful commit */
1886 WARN_ON_ONCE(chain->blob_next);
1887 kvfree(chain->blob_next);
1890 void nf_tables_chain_destroy(struct nft_ctx *ctx)
1892 struct nft_chain *chain = ctx->chain;
1893 struct nft_hook *hook, *next;
1895 if (WARN_ON(chain->use > 0))
1898 /* no concurrent access possible anymore */
1899 nf_tables_chain_free_chain_rules(chain);
1901 if (nft_is_base_chain(chain)) {
1902 struct nft_base_chain *basechain = nft_base_chain(chain);
1904 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
1905 list_for_each_entry_safe(hook, next,
1906 &basechain->hook_list, list) {
1907 list_del_rcu(&hook->list);
1908 kfree_rcu(hook, rcu);
1911 module_put(basechain->type->owner);
1912 if (rcu_access_pointer(basechain->stats)) {
1913 static_branch_dec(&nft_counters_enabled);
1914 free_percpu(rcu_dereference_raw(basechain->stats));
1917 kfree(chain->udata);
1921 kfree(chain->udata);
1926 static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
1927 const struct nlattr *attr)
1929 struct net_device *dev;
1930 char ifname[IFNAMSIZ];
1931 struct nft_hook *hook;
1934 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
1937 goto err_hook_alloc;
1940 nla_strscpy(ifname, attr, IFNAMSIZ);
1941 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
1942 * indirectly serializing all the other holders of the commit_mutex with
1945 dev = __dev_get_by_name(net, ifname);
1950 hook->ops.dev = dev;
1957 return ERR_PTR(err);
1960 static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
1961 const struct nft_hook *this)
1963 struct nft_hook *hook;
1965 list_for_each_entry(hook, hook_list, list) {
1966 if (this->ops.dev == hook->ops.dev)
1973 static int nf_tables_parse_netdev_hooks(struct net *net,
1974 const struct nlattr *attr,
1975 struct list_head *hook_list,
1976 struct netlink_ext_ack *extack)
1978 struct nft_hook *hook, *next;
1979 const struct nlattr *tmp;
1980 int rem, n = 0, err;
1982 nla_for_each_nested(tmp, attr, rem) {
1983 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
1988 hook = nft_netdev_hook_alloc(net, tmp);
1990 NL_SET_BAD_ATTR(extack, tmp);
1991 err = PTR_ERR(hook);
1994 if (nft_hook_list_find(hook_list, hook)) {
1995 NL_SET_BAD_ATTR(extack, tmp);
2000 list_add_tail(&hook->list, hook_list);
2003 if (n == NFT_NETDEVICE_MAX) {
2012 list_for_each_entry_safe(hook, next, hook_list, list) {
2013 list_del(&hook->list);
2019 struct nft_chain_hook {
2022 const struct nft_chain_type *type;
2023 struct list_head list;
2026 static int nft_chain_parse_netdev(struct net *net, struct nlattr *tb[],
2027 struct list_head *hook_list,
2028 struct netlink_ext_ack *extack, u32 flags)
2030 struct nft_hook *hook;
2033 if (tb[NFTA_HOOK_DEV]) {
2034 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
2036 NL_SET_BAD_ATTR(extack, tb[NFTA_HOOK_DEV]);
2037 return PTR_ERR(hook);
2040 list_add_tail(&hook->list, hook_list);
2041 } else if (tb[NFTA_HOOK_DEVS]) {
2042 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
2049 if (flags & NFT_CHAIN_HW_OFFLOAD &&
2050 list_empty(hook_list))
2056 static int nft_chain_parse_hook(struct net *net,
2057 struct nft_base_chain *basechain,
2058 const struct nlattr * const nla[],
2059 struct nft_chain_hook *hook, u8 family,
2060 u32 flags, struct netlink_ext_ack *extack)
2062 struct nftables_pernet *nft_net = nft_pernet(net);
2063 struct nlattr *ha[NFTA_HOOK_MAX + 1];
2064 const struct nft_chain_type *type;
2067 lockdep_assert_held(&nft_net->commit_mutex);
2068 lockdep_nfnl_nft_mutex_not_held();
2070 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2071 nla[NFTA_CHAIN_HOOK],
2072 nft_hook_policy, NULL);
2077 if (!ha[NFTA_HOOK_HOOKNUM] ||
2078 !ha[NFTA_HOOK_PRIORITY]) {
2079 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2083 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2084 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2086 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2090 if (nla[NFTA_CHAIN_TYPE]) {
2091 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
2094 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2095 return PTR_ERR(type);
2098 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
2101 if (type->type == NFT_CHAIN_T_NAT &&
2102 hook->priority <= NF_IP_PRI_CONNTRACK)
2105 if (ha[NFTA_HOOK_HOOKNUM]) {
2106 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2107 if (hook->num != basechain->ops.hooknum)
2110 if (ha[NFTA_HOOK_PRIORITY]) {
2111 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2112 if (hook->priority != basechain->ops.priority)
2116 type = basechain->type;
2119 if (!try_module_get(type->owner)) {
2120 if (nla[NFTA_CHAIN_TYPE])
2121 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2127 INIT_LIST_HEAD(&hook->list);
2128 if (nft_base_chain_netdev(family, hook->num)) {
2129 err = nft_chain_parse_netdev(net, ha, &hook->list, extack, flags);
2131 module_put(type->owner);
2134 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
2135 module_put(type->owner);
2142 static void nft_chain_release_hook(struct nft_chain_hook *hook)
2144 struct nft_hook *h, *next;
2146 list_for_each_entry_safe(h, next, &hook->list, list) {
2150 module_put(hook->type->owner);
2153 static void nft_last_rule(const struct nft_chain *chain, const void *ptr)
2155 struct nft_rule_dp_last *lrule;
2157 BUILD_BUG_ON(offsetof(struct nft_rule_dp_last, end) != 0);
2159 lrule = (struct nft_rule_dp_last *)ptr;
2160 lrule->end.is_last = 1;
2161 lrule->chain = chain;
2162 /* blob size does not include the trailer rule */
2165 static struct nft_rule_blob *nf_tables_chain_alloc_rules(const struct nft_chain *chain,
2168 struct nft_rule_blob *blob;
2173 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rule_dp_last);
2175 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2180 nft_last_rule(chain, blob->data);
2185 static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2186 const struct nft_chain_hook *hook,
2187 struct nft_chain *chain)
2190 ops->hooknum = hook->num;
2191 ops->priority = hook->priority;
2193 ops->hook = hook->type->hooks[ops->hooknum];
2194 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
2197 static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2198 struct nft_chain_hook *hook, u32 flags)
2200 struct nft_chain *chain;
2203 basechain->type = hook->type;
2204 INIT_LIST_HEAD(&basechain->hook_list);
2205 chain = &basechain->chain;
2207 if (nft_base_chain_netdev(family, hook->num)) {
2208 list_splice_init(&hook->list, &basechain->hook_list);
2209 list_for_each_entry(h, &basechain->hook_list, list)
2210 nft_basechain_hook_init(&h->ops, family, hook, chain);
2212 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
2214 chain->flags |= NFT_CHAIN_BASE | flags;
2215 basechain->policy = NF_ACCEPT;
2216 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
2217 !nft_chain_offload_support(basechain)) {
2218 list_splice_init(&basechain->hook_list, &hook->list);
2222 flow_block_init(&basechain->flow_block);
2227 static int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
2231 err = rhltable_insert_key(&table->chains_ht, chain->name,
2232 &chain->rhlhead, nft_chain_ht_params);
2236 list_add_tail_rcu(&chain->list, &table->chains);
2241 static u64 chain_id;
2243 static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
2244 u8 policy, u32 flags,
2245 struct netlink_ext_ack *extack)
2247 const struct nlattr * const *nla = ctx->nla;
2248 struct nft_table *table = ctx->table;
2249 struct nft_base_chain *basechain;
2250 struct net *net = ctx->net;
2251 char name[NFT_NAME_MAXLEN];
2252 struct nft_rule_blob *blob;
2253 struct nft_trans *trans;
2254 struct nft_chain *chain;
2257 if (table->use == UINT_MAX)
2260 if (nla[NFTA_CHAIN_HOOK]) {
2261 struct nft_stats __percpu *stats = NULL;
2262 struct nft_chain_hook hook = {};
2264 if (flags & NFT_CHAIN_BINDING)
2267 err = nft_chain_parse_hook(net, NULL, nla, &hook, family, flags,
2272 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
2273 if (basechain == NULL) {
2274 nft_chain_release_hook(&hook);
2277 chain = &basechain->chain;
2279 if (nla[NFTA_CHAIN_COUNTERS]) {
2280 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2281 if (IS_ERR(stats)) {
2282 nft_chain_release_hook(&hook);
2284 return PTR_ERR(stats);
2286 rcu_assign_pointer(basechain->stats, stats);
2289 err = nft_basechain_init(basechain, family, &hook, flags);
2291 nft_chain_release_hook(&hook);
2297 static_branch_inc(&nft_counters_enabled);
2299 if (flags & NFT_CHAIN_BASE)
2301 if (flags & NFT_CHAIN_HW_OFFLOAD)
2304 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
2308 chain->flags = flags;
2312 INIT_LIST_HEAD(&chain->rules);
2313 chain->handle = nf_tables_alloc_handle(table);
2314 chain->table = table;
2316 if (nla[NFTA_CHAIN_NAME]) {
2317 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
2319 if (!(flags & NFT_CHAIN_BINDING)) {
2321 goto err_destroy_chain;
2324 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
2325 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
2330 goto err_destroy_chain;
2333 if (nla[NFTA_CHAIN_USERDATA]) {
2334 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
2335 if (chain->udata == NULL) {
2337 goto err_destroy_chain;
2339 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
2342 blob = nf_tables_chain_alloc_rules(chain, 0);
2345 goto err_destroy_chain;
2348 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2349 RCU_INIT_POINTER(chain->blob_gen_1, blob);
2351 err = nf_tables_register_hook(net, table, chain);
2353 goto err_destroy_chain;
2355 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2356 if (IS_ERR(trans)) {
2357 err = PTR_ERR(trans);
2358 goto err_unregister_hook;
2361 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
2362 if (nft_is_base_chain(chain))
2363 nft_trans_chain_policy(trans) = policy;
2365 err = nft_chain_add(table, chain);
2367 nft_trans_destroy(trans);
2368 goto err_unregister_hook;
2374 err_unregister_hook:
2375 nf_tables_unregister_hook(net, table, chain);
2377 nf_tables_chain_destroy(ctx);
2382 static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
2383 u32 flags, const struct nlattr *attr,
2384 struct netlink_ext_ack *extack)
2386 const struct nlattr * const *nla = ctx->nla;
2387 struct nft_base_chain *basechain = NULL;
2388 struct nft_table *table = ctx->table;
2389 struct nft_chain *chain = ctx->chain;
2390 struct nft_chain_hook hook = {};
2391 struct nft_stats *stats = NULL;
2392 struct nft_hook *h, *next;
2393 struct nf_hook_ops *ops;
2394 struct nft_trans *trans;
2395 bool unregister = false;
2398 if (chain->flags ^ flags)
2401 INIT_LIST_HEAD(&hook.list);
2403 if (nla[NFTA_CHAIN_HOOK]) {
2404 if (!nft_is_base_chain(chain)) {
2405 NL_SET_BAD_ATTR(extack, attr);
2409 basechain = nft_base_chain(chain);
2410 err = nft_chain_parse_hook(ctx->net, basechain, nla, &hook,
2411 ctx->family, flags, extack);
2415 if (basechain->type != hook.type) {
2416 nft_chain_release_hook(&hook);
2417 NL_SET_BAD_ATTR(extack, attr);
2421 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2422 list_for_each_entry_safe(h, next, &hook.list, list) {
2423 h->ops.pf = basechain->ops.pf;
2424 h->ops.hooknum = basechain->ops.hooknum;
2425 h->ops.priority = basechain->ops.priority;
2426 h->ops.priv = basechain->ops.priv;
2427 h->ops.hook = basechain->ops.hook;
2429 if (nft_hook_list_find(&basechain->hook_list, h)) {
2435 ops = &basechain->ops;
2436 if (ops->hooknum != hook.num ||
2437 ops->priority != hook.priority) {
2438 nft_chain_release_hook(&hook);
2439 NL_SET_BAD_ATTR(extack, attr);
2445 if (nla[NFTA_CHAIN_HANDLE] &&
2446 nla[NFTA_CHAIN_NAME]) {
2447 struct nft_chain *chain2;
2449 chain2 = nft_chain_lookup(ctx->net, table,
2450 nla[NFTA_CHAIN_NAME], genmask);
2451 if (!IS_ERR(chain2)) {
2452 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2458 if (nla[NFTA_CHAIN_COUNTERS]) {
2459 if (!nft_is_base_chain(chain)) {
2464 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2465 if (IS_ERR(stats)) {
2466 err = PTR_ERR(stats);
2471 if (!(table->flags & NFT_TABLE_F_DORMANT) &&
2472 nft_is_base_chain(chain) &&
2473 !list_empty(&hook.list)) {
2474 basechain = nft_base_chain(chain);
2475 ops = &basechain->ops;
2477 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {
2478 err = nft_netdev_register_hooks(ctx->net, &hook.list);
2486 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2487 sizeof(struct nft_trans_chain));
2491 nft_trans_chain_stats(trans) = stats;
2492 nft_trans_chain_update(trans) = true;
2494 if (nla[NFTA_CHAIN_POLICY])
2495 nft_trans_chain_policy(trans) = policy;
2497 nft_trans_chain_policy(trans) = -1;
2499 if (nla[NFTA_CHAIN_HANDLE] &&
2500 nla[NFTA_CHAIN_NAME]) {
2501 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
2502 struct nft_trans *tmp;
2506 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
2511 list_for_each_entry(tmp, &nft_net->commit_list, list) {
2512 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2513 tmp->ctx.table == table &&
2514 nft_trans_chain_update(tmp) &&
2515 nft_trans_chain_name(tmp) &&
2516 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
2517 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2523 nft_trans_chain_name(trans) = name;
2526 nft_trans_basechain(trans) = basechain;
2527 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2528 list_splice(&hook.list, &nft_trans_chain_hooks(trans));
2530 nft_trans_commit_list_add_tail(ctx->net, trans);
2538 if (nla[NFTA_CHAIN_HOOK]) {
2539 list_for_each_entry_safe(h, next, &hook.list, list) {
2541 nf_unregister_net_hook(ctx->net, &h->ops);
2545 module_put(hook.type->owner);
2551 static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
2552 const struct nft_table *table,
2553 const struct nlattr *nla)
2555 struct nftables_pernet *nft_net = nft_pernet(net);
2556 u32 id = ntohl(nla_get_be32(nla));
2557 struct nft_trans *trans;
2559 list_for_each_entry(trans, &nft_net->commit_list, list) {
2560 struct nft_chain *chain = trans->ctx.chain;
2562 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
2563 chain->table == table &&
2564 id == nft_trans_chain_id(trans))
2567 return ERR_PTR(-ENOENT);
2570 static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2571 const struct nlattr * const nla[])
2573 struct nftables_pernet *nft_net = nft_pernet(info->net);
2574 struct netlink_ext_ack *extack = info->extack;
2575 u8 genmask = nft_genmask_next(info->net);
2576 u8 family = info->nfmsg->nfgen_family;
2577 struct nft_chain *chain = NULL;
2578 struct net *net = info->net;
2579 const struct nlattr *attr;
2580 struct nft_table *table;
2581 u8 policy = NF_ACCEPT;
2586 lockdep_assert_held(&nft_net->commit_mutex);
2588 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2589 NETLINK_CB(skb).portid);
2590 if (IS_ERR(table)) {
2591 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
2592 return PTR_ERR(table);
2596 attr = nla[NFTA_CHAIN_NAME];
2598 if (nla[NFTA_CHAIN_HANDLE]) {
2599 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
2600 chain = nft_chain_lookup_byhandle(table, handle, genmask);
2601 if (IS_ERR(chain)) {
2602 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
2603 return PTR_ERR(chain);
2605 attr = nla[NFTA_CHAIN_HANDLE];
2606 } else if (nla[NFTA_CHAIN_NAME]) {
2607 chain = nft_chain_lookup(net, table, attr, genmask);
2608 if (IS_ERR(chain)) {
2609 if (PTR_ERR(chain) != -ENOENT) {
2610 NL_SET_BAD_ATTR(extack, attr);
2611 return PTR_ERR(chain);
2615 } else if (!nla[NFTA_CHAIN_ID]) {
2619 if (nla[NFTA_CHAIN_POLICY]) {
2620 if (chain != NULL &&
2621 !nft_is_base_chain(chain)) {
2622 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
2626 if (chain == NULL &&
2627 nla[NFTA_CHAIN_HOOK] == NULL) {
2628 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
2632 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
2642 if (nla[NFTA_CHAIN_FLAGS])
2643 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
2645 flags = chain->flags;
2647 if (flags & ~NFT_CHAIN_FLAGS)
2650 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2652 if (chain != NULL) {
2653 if (chain->flags & NFT_CHAIN_BINDING)
2656 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
2657 NL_SET_BAD_ATTR(extack, attr);
2660 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
2663 flags |= chain->flags & NFT_CHAIN_BASE;
2664 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2668 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
2671 static int nft_delchain_hook(struct nft_ctx *ctx, struct nft_chain *chain,
2672 struct netlink_ext_ack *extack)
2674 const struct nlattr * const *nla = ctx->nla;
2675 struct nft_chain_hook chain_hook = {};
2676 struct nft_base_chain *basechain;
2677 struct nft_hook *this, *hook;
2678 LIST_HEAD(chain_del_list);
2679 struct nft_trans *trans;
2682 if (!nft_is_base_chain(chain))
2685 basechain = nft_base_chain(chain);
2686 err = nft_chain_parse_hook(ctx->net, basechain, nla, &chain_hook,
2687 ctx->family, chain->flags, extack);
2691 list_for_each_entry(this, &chain_hook.list, list) {
2692 hook = nft_hook_list_find(&basechain->hook_list, this);
2695 goto err_chain_del_hook;
2697 list_move(&hook->list, &chain_del_list);
2700 trans = nft_trans_alloc(ctx, NFT_MSG_DELCHAIN,
2701 sizeof(struct nft_trans_chain));
2704 goto err_chain_del_hook;
2707 nft_trans_basechain(trans) = basechain;
2708 nft_trans_chain_update(trans) = true;
2709 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2710 list_splice(&chain_del_list, &nft_trans_chain_hooks(trans));
2711 nft_chain_release_hook(&chain_hook);
2713 nft_trans_commit_list_add_tail(ctx->net, trans);
2718 list_splice(&chain_del_list, &basechain->hook_list);
2719 nft_chain_release_hook(&chain_hook);
2724 static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2725 const struct nlattr * const nla[])
2727 struct netlink_ext_ack *extack = info->extack;
2728 u8 genmask = nft_genmask_next(info->net);
2729 u8 family = info->nfmsg->nfgen_family;
2730 struct net *net = info->net;
2731 const struct nlattr *attr;
2732 struct nft_table *table;
2733 struct nft_chain *chain;
2734 struct nft_rule *rule;
2740 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2741 NETLINK_CB(skb).portid);
2742 if (IS_ERR(table)) {
2743 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
2744 return PTR_ERR(table);
2747 if (nla[NFTA_CHAIN_HANDLE]) {
2748 attr = nla[NFTA_CHAIN_HANDLE];
2749 handle = be64_to_cpu(nla_get_be64(attr));
2750 chain = nft_chain_lookup_byhandle(table, handle, genmask);
2752 attr = nla[NFTA_CHAIN_NAME];
2753 chain = nft_chain_lookup(net, table, attr, genmask);
2755 if (IS_ERR(chain)) {
2756 if (PTR_ERR(chain) == -ENOENT &&
2757 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
2760 NL_SET_BAD_ATTR(extack, attr);
2761 return PTR_ERR(chain);
2764 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2766 if (nla[NFTA_CHAIN_HOOK]) {
2767 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2770 return nft_delchain_hook(&ctx, chain, extack);
2773 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
2778 list_for_each_entry(rule, &chain->rules, list) {
2779 if (!nft_is_active_next(net, rule))
2783 err = nft_delrule(&ctx, rule);
2788 /* There are rules and elements that are still holding references to us,
2789 * we cannot do a recursive removal in this case.
2792 NL_SET_BAD_ATTR(extack, attr);
2796 return nft_delchain(&ctx);
2804 * nft_register_expr - register nf_tables expr type
2807 * Registers the expr type for use with nf_tables. Returns zero on
2808 * success or a negative errno code otherwise.
2810 int nft_register_expr(struct nft_expr_type *type)
2812 nfnl_lock(NFNL_SUBSYS_NFTABLES);
2813 if (type->family == NFPROTO_UNSPEC)
2814 list_add_tail_rcu(&type->list, &nf_tables_expressions);
2816 list_add_rcu(&type->list, &nf_tables_expressions);
2817 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2820 EXPORT_SYMBOL_GPL(nft_register_expr);
2823 * nft_unregister_expr - unregister nf_tables expr type
2826 * Unregisters the expr typefor use with nf_tables.
2828 void nft_unregister_expr(struct nft_expr_type *type)
2830 nfnl_lock(NFNL_SUBSYS_NFTABLES);
2831 list_del_rcu(&type->list);
2832 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2834 EXPORT_SYMBOL_GPL(nft_unregister_expr);
2836 static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2839 const struct nft_expr_type *type, *candidate = NULL;
2841 list_for_each_entry(type, &nf_tables_expressions, list) {
2842 if (!nla_strcmp(nla, type->name)) {
2843 if (!type->family && !candidate)
2845 else if (type->family == family)
2852 #ifdef CONFIG_MODULES
2853 static int nft_expr_type_request_module(struct net *net, u8 family,
2856 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
2857 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
2864 static const struct nft_expr_type *nft_expr_type_get(struct net *net,
2868 const struct nft_expr_type *type;
2871 return ERR_PTR(-EINVAL);
2873 type = __nft_expr_type_get(family, nla);
2874 if (type != NULL && try_module_get(type->owner))
2877 lockdep_nfnl_nft_mutex_not_held();
2878 #ifdef CONFIG_MODULES
2880 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
2881 return ERR_PTR(-EAGAIN);
2883 if (nft_request_module(net, "nft-expr-%.*s",
2885 (char *)nla_data(nla)) == -EAGAIN)
2886 return ERR_PTR(-EAGAIN);
2889 return ERR_PTR(-ENOENT);
2892 static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
2893 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
2894 .len = NFT_MODULE_AUTOLOAD_LIMIT },
2895 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
2898 static int nf_tables_fill_expr_info(struct sk_buff *skb,
2899 const struct nft_expr *expr, bool reset)
2901 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
2902 goto nla_put_failure;
2904 if (expr->ops->dump) {
2905 struct nlattr *data = nla_nest_start_noflag(skb,
2908 goto nla_put_failure;
2909 if (expr->ops->dump(skb, expr, reset) < 0)
2910 goto nla_put_failure;
2911 nla_nest_end(skb, data);
2920 int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
2921 const struct nft_expr *expr, bool reset)
2923 struct nlattr *nest;
2925 nest = nla_nest_start_noflag(skb, attr);
2927 goto nla_put_failure;
2928 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
2929 goto nla_put_failure;
2930 nla_nest_end(skb, nest);
2937 struct nft_expr_info {
2938 const struct nft_expr_ops *ops;
2939 const struct nlattr *attr;
2940 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
2943 static int nf_tables_expr_parse(const struct nft_ctx *ctx,
2944 const struct nlattr *nla,
2945 struct nft_expr_info *info)
2947 const struct nft_expr_type *type;
2948 const struct nft_expr_ops *ops;
2949 struct nlattr *tb[NFTA_EXPR_MAX + 1];
2952 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
2953 nft_expr_policy, NULL);
2957 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
2959 return PTR_ERR(type);
2961 if (tb[NFTA_EXPR_DATA]) {
2962 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
2964 type->policy, NULL);
2968 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
2970 if (type->select_ops != NULL) {
2971 ops = type->select_ops(ctx,
2972 (const struct nlattr * const *)info->tb);
2975 #ifdef CONFIG_MODULES
2977 if (nft_expr_type_request_module(ctx->net,
2979 tb[NFTA_EXPR_NAME]) != -EAGAIN)
2993 module_put(type->owner);
2997 int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
2998 struct nft_expr_info *info)
3000 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3001 const struct nft_expr_type *type;
3004 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3005 nft_expr_policy, NULL);
3009 if (!tb[NFTA_EXPR_DATA])
3012 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
3016 if (!type->inner_ops)
3019 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3021 type->policy, NULL);
3026 info->ops = type->inner_ops;
3034 static int nf_tables_newexpr(const struct nft_ctx *ctx,
3035 const struct nft_expr_info *expr_info,
3036 struct nft_expr *expr)
3038 const struct nft_expr_ops *ops = expr_info->ops;
3043 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
3054 static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
3055 struct nft_expr *expr)
3057 const struct nft_expr_type *type = expr->ops->type;
3059 if (expr->ops->destroy)
3060 expr->ops->destroy(ctx, expr);
3061 module_put(type->owner);
3064 static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
3065 const struct nlattr *nla)
3067 struct nft_expr_info expr_info;
3068 struct nft_expr *expr;
3069 struct module *owner;
3072 err = nf_tables_expr_parse(ctx, nla, &expr_info);
3074 goto err_expr_parse;
3077 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
3078 goto err_expr_stateful;
3081 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
3083 goto err_expr_stateful;
3085 err = nf_tables_newexpr(ctx, &expr_info, expr);
3093 owner = expr_info.ops->type->owner;
3094 if (expr_info.ops->type->release_ops)
3095 expr_info.ops->type->release_ops(expr_info.ops);
3099 return ERR_PTR(err);
3102 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
3106 if (src->ops->clone) {
3107 dst->ops = src->ops;
3108 err = src->ops->clone(dst, src);
3112 memcpy(dst, src, src->ops->size);
3115 __module_get(src->ops->type->owner);
3120 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
3122 nf_tables_expr_destroy(ctx, expr);
3130 static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
3133 struct nft_rule *rule;
3135 // FIXME: this sucks
3136 list_for_each_entry_rcu(rule, &chain->rules, list) {
3137 if (handle == rule->handle)
3141 return ERR_PTR(-ENOENT);
3144 static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3145 const struct nlattr *nla)
3148 return ERR_PTR(-EINVAL);
3150 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
3153 static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
3154 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3155 .len = NFT_TABLE_MAXNAMELEN - 1 },
3156 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3157 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3158 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
3159 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
3160 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
3161 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
3162 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3163 .len = NFT_USERDATA_MAXLEN },
3164 [NFTA_RULE_ID] = { .type = NLA_U32 },
3165 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
3166 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
3169 static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3170 u32 portid, u32 seq, int event,
3171 u32 flags, int family,
3172 const struct nft_table *table,
3173 const struct nft_chain *chain,
3174 const struct nft_rule *rule, u64 handle,
3177 struct nlmsghdr *nlh;
3178 const struct nft_expr *expr, *next;
3179 struct nlattr *list;
3180 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
3182 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3185 goto nla_put_failure;
3187 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3188 goto nla_put_failure;
3189 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3190 goto nla_put_failure;
3191 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3193 goto nla_put_failure;
3195 if (event != NFT_MSG_DELRULE && handle) {
3196 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
3198 goto nla_put_failure;
3201 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3202 nft_flow_rule_stats(chain, rule);
3204 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
3206 goto nla_put_failure;
3207 nft_rule_for_each_expr(expr, next, rule) {
3208 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
3209 goto nla_put_failure;
3211 nla_nest_end(skb, list);
3214 struct nft_userdata *udata = nft_userdata(rule);
3215 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3217 goto nla_put_failure;
3220 nlmsg_end(skb, nlh);
3224 nlmsg_trim(skb, nlh);
3228 static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3229 const struct nft_rule *rule, int event)
3231 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3232 const struct nft_rule *prule;
3233 struct sk_buff *skb;
3239 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
3242 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3246 if (event == NFT_MSG_NEWRULE &&
3247 !list_is_first(&rule->list, &ctx->chain->rules) &&
3248 !list_is_last(&rule->list, &ctx->chain->rules)) {
3249 prule = list_prev_entry(rule, list);
3250 handle = prule->handle;
3252 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3253 flags |= NLM_F_APPEND;
3254 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3255 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
3257 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
3258 event, flags, ctx->family, ctx->table,
3259 ctx->chain, rule, handle, false);
3265 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3268 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
3271 struct nft_rule_dump_ctx {
3276 static int __nf_tables_dump_rules(struct sk_buff *skb,
3278 struct netlink_callback *cb,
3279 const struct nft_table *table,
3280 const struct nft_chain *chain,
3283 struct net *net = sock_net(skb->sk);
3284 const struct nft_rule *rule, *prule;
3285 unsigned int s_idx = cb->args[0];
3289 list_for_each_entry_rcu(rule, &chain->rules, list) {
3290 if (!nft_is_active(net, rule))
3295 memset(&cb->args[1], 0,
3296 sizeof(cb->args) - sizeof(cb->args[0]));
3299 handle = prule->handle;
3303 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3306 NLM_F_MULTI | NLM_F_APPEND,
3308 table, chain, rule, handle, reset) < 0)
3311 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3320 static int nf_tables_dump_rules(struct sk_buff *skb,
3321 struct netlink_callback *cb)
3323 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
3324 const struct nft_rule_dump_ctx *ctx = cb->data;
3325 struct nft_table *table;
3326 const struct nft_chain *chain;
3327 unsigned int idx = 0;
3328 struct net *net = sock_net(skb->sk);
3329 int family = nfmsg->nfgen_family;
3330 struct nftables_pernet *nft_net;
3333 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3337 nft_net = nft_pernet(net);
3338 cb->seq = READ_ONCE(nft_net->base_seq);
3340 list_for_each_entry_rcu(table, &nft_net->tables, list) {
3341 if (family != NFPROTO_UNSPEC && family != table->family)
3344 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
3347 if (ctx && ctx->table && ctx->chain) {
3348 struct rhlist_head *list, *tmp;
3350 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3351 nft_chain_ht_params);
3355 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3356 if (!nft_is_active(net, chain))
3358 __nf_tables_dump_rules(skb, &idx,
3359 cb, table, chain, reset);
3365 list_for_each_entry_rcu(chain, &table->chains, list) {
3366 if (__nf_tables_dump_rules(skb, &idx,
3367 cb, table, chain, reset))
3371 if (ctx && ctx->table)
3381 static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3383 const struct nlattr * const *nla = cb->data;
3384 struct nft_rule_dump_ctx *ctx = NULL;
3386 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3387 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3391 if (nla[NFTA_RULE_TABLE]) {
3392 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3399 if (nla[NFTA_RULE_CHAIN]) {
3400 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3414 static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3416 struct nft_rule_dump_ctx *ctx = cb->data;
3426 /* called with rcu_read_lock held */
3427 static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3428 const struct nlattr * const nla[])
3430 struct netlink_ext_ack *extack = info->extack;
3431 u8 genmask = nft_genmask_cur(info->net);
3432 u8 family = info->nfmsg->nfgen_family;
3433 const struct nft_chain *chain;
3434 const struct nft_rule *rule;
3435 struct net *net = info->net;
3436 struct nft_table *table;
3437 struct sk_buff *skb2;
3441 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3442 struct netlink_dump_control c = {
3443 .start= nf_tables_dump_rules_start,
3444 .dump = nf_tables_dump_rules,
3445 .done = nf_tables_dump_rules_done,
3446 .module = THIS_MODULE,
3447 .data = (void *)nla,
3450 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3453 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
3454 if (IS_ERR(table)) {
3455 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3456 return PTR_ERR(table);
3459 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
3460 if (IS_ERR(chain)) {
3461 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3462 return PTR_ERR(chain);
3465 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
3467 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3468 return PTR_ERR(rule);
3471 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3475 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3478 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
3479 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
3480 family, table, chain, rule, 0, reset);
3482 goto err_fill_rule_info;
3484 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
3491 static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
3492 struct nft_rule *rule)
3494 struct nft_expr *expr, *next;
3497 * Careful: some expressions might not be initialized in case this
3498 * is called on error from nf_tables_newrule().
3500 expr = nft_expr_first(rule);
3501 while (nft_expr_more(rule, expr)) {
3502 next = nft_expr_next(expr);
3503 nf_tables_expr_destroy(ctx, expr);
3509 void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
3511 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
3512 nf_tables_rule_destroy(ctx, rule);
3515 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3517 struct nft_expr *expr, *last;
3518 const struct nft_data *data;
3519 struct nft_rule *rule;
3522 if (ctx->level == NFT_JUMP_STACK_SIZE)
3525 list_for_each_entry(rule, &chain->rules, list) {
3526 if (!nft_is_active_next(ctx->net, rule))
3529 nft_rule_for_each_expr(expr, last, rule) {
3530 if (!expr->ops->validate)
3533 err = expr->ops->validate(ctx, expr, &data);
3543 EXPORT_SYMBOL_GPL(nft_chain_validate);
3545 static int nft_table_validate(struct net *net, const struct nft_table *table)
3547 struct nft_chain *chain;
3548 struct nft_ctx ctx = {
3550 .family = table->family,
3554 list_for_each_entry(chain, &table->chains, list) {
3555 if (!nft_is_base_chain(chain))
3559 err = nft_chain_validate(&ctx, chain);
3567 int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
3568 const struct nft_set_iter *iter,
3569 struct nft_set_elem *elem)
3571 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
3572 struct nft_ctx *pctx = (struct nft_ctx *)ctx;
3573 const struct nft_data *data;
3576 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
3577 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
3580 data = nft_set_ext_data(ext);
3581 switch (data->verdict.code) {
3585 err = nft_chain_validate(ctx, data->verdict.chain);
3597 struct nft_set_elem_catchall {
3598 struct list_head list;
3599 struct rcu_head rcu;
3603 int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
3605 u8 genmask = nft_genmask_next(ctx->net);
3606 struct nft_set_elem_catchall *catchall;
3607 struct nft_set_elem elem;
3608 struct nft_set_ext *ext;
3611 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
3612 ext = nft_set_elem_ext(set, catchall->elem);
3613 if (!nft_set_elem_active(ext, genmask))
3616 elem.priv = catchall->elem;
3617 ret = nft_setelem_validate(ctx, set, NULL, &elem);
3625 static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
3626 const struct nft_chain *chain,
3627 const struct nlattr *nla);
3629 #define NFT_RULE_MAXEXPRS 128
3631 static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3632 const struct nlattr * const nla[])
3634 struct nftables_pernet *nft_net = nft_pernet(info->net);
3635 struct netlink_ext_ack *extack = info->extack;
3636 unsigned int size, i, n, ulen = 0, usize = 0;
3637 u8 genmask = nft_genmask_next(info->net);
3638 struct nft_rule *rule, *old_rule = NULL;
3639 struct nft_expr_info *expr_info = NULL;
3640 u8 family = info->nfmsg->nfgen_family;
3641 struct nft_flow_rule *flow = NULL;
3642 struct net *net = info->net;
3643 struct nft_userdata *udata;
3644 struct nft_table *table;
3645 struct nft_chain *chain;
3646 struct nft_trans *trans;
3647 u64 handle, pos_handle;
3648 struct nft_expr *expr;
3653 lockdep_assert_held(&nft_net->commit_mutex);
3655 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3656 NETLINK_CB(skb).portid);
3657 if (IS_ERR(table)) {
3658 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3659 return PTR_ERR(table);
3662 if (nla[NFTA_RULE_CHAIN]) {
3663 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3665 if (IS_ERR(chain)) {
3666 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3667 return PTR_ERR(chain);
3669 if (nft_chain_is_bound(chain))
3672 } else if (nla[NFTA_RULE_CHAIN_ID]) {
3673 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
3674 if (IS_ERR(chain)) {
3675 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3676 return PTR_ERR(chain);
3682 if (nla[NFTA_RULE_HANDLE]) {
3683 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
3684 rule = __nft_rule_lookup(chain, handle);
3686 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3687 return PTR_ERR(rule);
3690 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
3691 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3694 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
3699 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3700 info->nlh->nlmsg_flags & NLM_F_REPLACE)
3702 handle = nf_tables_alloc_handle(table);
3704 if (chain->use == UINT_MAX)
3707 if (nla[NFTA_RULE_POSITION]) {
3708 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3709 old_rule = __nft_rule_lookup(chain, pos_handle);
3710 if (IS_ERR(old_rule)) {
3711 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3712 return PTR_ERR(old_rule);
3714 } else if (nla[NFTA_RULE_POSITION_ID]) {
3715 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
3716 if (IS_ERR(old_rule)) {
3717 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3718 return PTR_ERR(old_rule);
3723 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
3727 if (nla[NFTA_RULE_EXPRESSIONS]) {
3728 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3729 sizeof(struct nft_expr_info),
3734 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3736 if (nla_type(tmp) != NFTA_LIST_ELEM)
3737 goto err_release_expr;
3738 if (n == NFT_RULE_MAXEXPRS)
3739 goto err_release_expr;
3740 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
3742 NL_SET_BAD_ATTR(extack, tmp);
3743 goto err_release_expr;
3745 size += expr_info[n].ops->size;
3749 /* Check for overflow of dlen field */
3751 if (size >= 1 << 12)
3752 goto err_release_expr;
3754 if (nla[NFTA_RULE_USERDATA]) {
3755 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
3757 usize = sizeof(struct nft_userdata) + ulen;
3761 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
3763 goto err_release_expr;
3765 nft_activate_next(net, rule);
3767 rule->handle = handle;
3769 rule->udata = ulen ? 1 : 0;
3772 udata = nft_userdata(rule);
3773 udata->len = ulen - 1;
3774 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3777 expr = nft_expr_first(rule);
3778 for (i = 0; i < n; i++) {
3779 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
3781 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3782 goto err_release_rule;
3785 if (expr_info[i].ops->validate)
3786 nft_validate_state_update(table, NFT_VALIDATE_NEED);
3788 expr_info[i].ops = NULL;
3789 expr = nft_expr_next(expr);
3792 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3793 flow = nft_flow_rule_create(net, rule);
3795 err = PTR_ERR(flow);
3796 goto err_release_rule;
3800 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
3801 err = nft_delrule(&ctx, old_rule);
3803 goto err_destroy_flow_rule;
3805 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3806 if (trans == NULL) {
3808 goto err_destroy_flow_rule;
3810 list_add_tail_rcu(&rule->list, &old_rule->list);
3812 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3815 goto err_destroy_flow_rule;
3818 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
3820 list_add_rcu(&rule->list, &old_rule->list);
3822 list_add_tail_rcu(&rule->list, &chain->rules);
3825 list_add_tail_rcu(&rule->list, &old_rule->list);
3827 list_add_rcu(&rule->list, &chain->rules);
3834 nft_trans_flow_rule(trans) = flow;
3836 if (table->validate_state == NFT_VALIDATE_DO)
3837 return nft_table_validate(net, table);
3841 err_destroy_flow_rule:
3843 nft_flow_rule_destroy(flow);
3845 nf_tables_rule_release(&ctx, rule);
3847 for (i = 0; i < n; i++) {
3848 if (expr_info[i].ops) {
3849 module_put(expr_info[i].ops->type->owner);
3850 if (expr_info[i].ops->type->release_ops)
3851 expr_info[i].ops->type->release_ops(expr_info[i].ops);
3859 static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
3860 const struct nft_chain *chain,
3861 const struct nlattr *nla)
3863 struct nftables_pernet *nft_net = nft_pernet(net);
3864 u32 id = ntohl(nla_get_be32(nla));
3865 struct nft_trans *trans;
3867 list_for_each_entry(trans, &nft_net->commit_list, list) {
3868 if (trans->msg_type == NFT_MSG_NEWRULE &&
3869 trans->ctx.chain == chain &&
3870 id == nft_trans_rule_id(trans))
3871 return nft_trans_rule(trans);
3873 return ERR_PTR(-ENOENT);
3876 static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3877 const struct nlattr * const nla[])
3879 struct netlink_ext_ack *extack = info->extack;
3880 u8 genmask = nft_genmask_next(info->net);
3881 u8 family = info->nfmsg->nfgen_family;
3882 struct nft_chain *chain = NULL;
3883 struct net *net = info->net;
3884 struct nft_table *table;
3885 struct nft_rule *rule;
3889 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3890 NETLINK_CB(skb).portid);
3891 if (IS_ERR(table)) {
3892 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3893 return PTR_ERR(table);
3896 if (nla[NFTA_RULE_CHAIN]) {
3897 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3899 if (IS_ERR(chain)) {
3900 if (PTR_ERR(chain) == -ENOENT &&
3901 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
3904 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3905 return PTR_ERR(chain);
3907 if (nft_chain_is_bound(chain))
3911 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
3914 if (nla[NFTA_RULE_HANDLE]) {
3915 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
3917 if (PTR_ERR(rule) == -ENOENT &&
3918 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
3921 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3922 return PTR_ERR(rule);
3925 err = nft_delrule(&ctx, rule);
3926 } else if (nla[NFTA_RULE_ID]) {
3927 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
3929 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
3930 return PTR_ERR(rule);
3933 err = nft_delrule(&ctx, rule);
3935 err = nft_delrule_by_chain(&ctx);
3938 list_for_each_entry(chain, &table->chains, list) {
3939 if (!nft_is_active_next(net, chain))
3943 err = nft_delrule_by_chain(&ctx);
3955 static const struct nft_set_type *nft_set_types[] = {
3956 &nft_set_hash_fast_type,
3958 &nft_set_rhash_type,
3959 &nft_set_bitmap_type,
3960 &nft_set_rbtree_type,
3961 #if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
3962 &nft_set_pipapo_avx2_type,
3964 &nft_set_pipapo_type,
3967 #define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
3968 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3971 static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
3973 return (flags & type->features) == (flags & NFT_SET_FEATURES);
3977 * Select a set implementation based on the data characteristics and the
3978 * given policy. The total memory use might not be known if no size is
3979 * given, in that case the amount of memory per element is used.
3981 static const struct nft_set_ops *
3982 nft_select_set_ops(const struct nft_ctx *ctx,
3983 const struct nlattr * const nla[],
3984 const struct nft_set_desc *desc)
3986 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3987 const struct nft_set_ops *ops, *bops;
3988 struct nft_set_estimate est, best;
3989 const struct nft_set_type *type;
3993 lockdep_assert_held(&nft_net->commit_mutex);
3994 lockdep_nfnl_nft_mutex_not_held();
3996 if (nla[NFTA_SET_FLAGS] != NULL)
3997 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4004 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
4005 type = nft_set_types[i];
4008 if (!nft_set_ops_candidate(type, flags))
4010 if (!ops->estimate(desc, flags, &est))
4013 switch (desc->policy) {
4014 case NFT_SET_POL_PERFORMANCE:
4015 if (est.lookup < best.lookup)
4017 if (est.lookup == best.lookup &&
4018 est.space < best.space)
4021 case NFT_SET_POL_MEMORY:
4023 if (est.space < best.space)
4025 if (est.space == best.space &&
4026 est.lookup < best.lookup)
4028 } else if (est.size < best.size || !bops) {
4043 return ERR_PTR(-EOPNOTSUPP);
4046 static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
4047 [NFTA_SET_TABLE] = { .type = NLA_STRING,
4048 .len = NFT_TABLE_MAXNAMELEN - 1 },
4049 [NFTA_SET_NAME] = { .type = NLA_STRING,
4050 .len = NFT_SET_MAXNAMELEN - 1 },
4051 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
4052 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
4053 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
4054 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
4055 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
4056 [NFTA_SET_POLICY] = { .type = NLA_U32 },
4057 [NFTA_SET_DESC] = { .type = NLA_NESTED },
4058 [NFTA_SET_ID] = { .type = NLA_U32 },
4059 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
4060 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
4061 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
4062 .len = NFT_USERDATA_MAXLEN },
4063 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
4064 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
4065 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
4066 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
4069 static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
4070 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
4071 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
4074 static struct nft_set *nft_set_lookup(const struct nft_table *table,
4075 const struct nlattr *nla, u8 genmask)
4077 struct nft_set *set;
4080 return ERR_PTR(-EINVAL);
4082 list_for_each_entry_rcu(set, &table->sets, list) {
4083 if (!nla_strcmp(nla, set->name) &&
4084 nft_active_genmask(set, genmask))
4087 return ERR_PTR(-ENOENT);
4090 static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
4091 const struct nlattr *nla,
4094 struct nft_set *set;
4096 list_for_each_entry(set, &table->sets, list) {
4097 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
4098 nft_active_genmask(set, genmask))
4101 return ERR_PTR(-ENOENT);
4104 static struct nft_set *nft_set_lookup_byid(const struct net *net,
4105 const struct nft_table *table,
4106 const struct nlattr *nla, u8 genmask)
4108 struct nftables_pernet *nft_net = nft_pernet(net);
4109 u32 id = ntohl(nla_get_be32(nla));
4110 struct nft_trans *trans;
4112 list_for_each_entry(trans, &nft_net->commit_list, list) {
4113 if (trans->msg_type == NFT_MSG_NEWSET) {
4114 struct nft_set *set = nft_trans_set(trans);
4116 if (id == nft_trans_set_id(trans) &&
4117 set->table == table &&
4118 nft_active_genmask(set, genmask))
4122 return ERR_PTR(-ENOENT);
4125 struct nft_set *nft_set_lookup_global(const struct net *net,
4126 const struct nft_table *table,
4127 const struct nlattr *nla_set_name,
4128 const struct nlattr *nla_set_id,
4131 struct nft_set *set;
4133 set = nft_set_lookup(table, nla_set_name, genmask);
4138 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
4142 EXPORT_SYMBOL_GPL(nft_set_lookup_global);
4144 static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
4147 const struct nft_set *i;
4149 unsigned long *inuse;
4150 unsigned int n = 0, min = 0;
4152 p = strchr(name, '%');
4154 if (p[1] != 'd' || strchr(p + 2, '%'))
4157 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
4161 list_for_each_entry(i, &ctx->table->sets, list) {
4164 if (!nft_is_active_next(ctx->net, i))
4166 if (!sscanf(i->name, name, &tmp))
4168 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
4171 set_bit(tmp - min, inuse);
4174 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
4175 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
4176 min += BITS_PER_BYTE * PAGE_SIZE;
4177 memset(inuse, 0, PAGE_SIZE);
4180 free_page((unsigned long)inuse);
4183 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
4187 list_for_each_entry(i, &ctx->table->sets, list) {
4188 if (!nft_is_active_next(ctx->net, i))
4190 if (!strcmp(set->name, i->name)) {
4199 int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
4201 u64 ms = be64_to_cpu(nla_get_be64(nla));
4202 u64 max = (u64)(~((u64)0));
4204 max = div_u64(max, NSEC_PER_MSEC);
4208 ms *= NSEC_PER_MSEC;
4209 *result = nsecs_to_jiffies64(ms);
4213 __be64 nf_jiffies64_to_msecs(u64 input)
4215 return cpu_to_be64(jiffies64_to_msecs(input));
4218 static int nf_tables_fill_set_concat(struct sk_buff *skb,
4219 const struct nft_set *set)
4221 struct nlattr *concat, *field;
4224 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4228 for (i = 0; i < set->field_count; i++) {
4229 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4233 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4234 htonl(set->field_len[i])))
4237 nla_nest_end(skb, field);
4240 nla_nest_end(skb, concat);
4245 static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4246 const struct nft_set *set, u16 event, u16 flags)
4248 u64 timeout = READ_ONCE(set->timeout);
4249 u32 gc_int = READ_ONCE(set->gc_int);
4250 u32 portid = ctx->portid;
4251 struct nlmsghdr *nlh;
4252 struct nlattr *nest;
4256 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
4257 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4258 NFNETLINK_V0, nft_base_seq(ctx->net));
4260 goto nla_put_failure;
4262 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4263 goto nla_put_failure;
4264 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4265 goto nla_put_failure;
4266 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4268 goto nla_put_failure;
4270 if (event == NFT_MSG_DELSET) {
4271 nlmsg_end(skb, nlh);
4275 if (set->flags != 0)
4276 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4277 goto nla_put_failure;
4279 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4280 goto nla_put_failure;
4281 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4282 goto nla_put_failure;
4283 if (set->flags & NFT_SET_MAP) {
4284 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4285 goto nla_put_failure;
4286 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4287 goto nla_put_failure;
4289 if (set->flags & NFT_SET_OBJECT &&
4290 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4291 goto nla_put_failure;
4294 nla_put_be64(skb, NFTA_SET_TIMEOUT,
4295 nf_jiffies64_to_msecs(timeout),
4297 goto nla_put_failure;
4299 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(gc_int)))
4300 goto nla_put_failure;
4302 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4303 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4304 goto nla_put_failure;
4308 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
4309 goto nla_put_failure;
4311 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4313 goto nla_put_failure;
4315 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4316 goto nla_put_failure;
4318 if (set->field_count > 1 &&
4319 nf_tables_fill_set_concat(skb, set))
4320 goto nla_put_failure;
4322 nla_nest_end(skb, nest);
4324 if (set->num_exprs == 1) {
4325 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
4326 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
4327 goto nla_put_failure;
4329 nla_nest_end(skb, nest);
4330 } else if (set->num_exprs > 1) {
4331 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4333 goto nla_put_failure;
4335 for (i = 0; i < set->num_exprs; i++) {
4336 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
4337 set->exprs[i], false) < 0)
4338 goto nla_put_failure;
4340 nla_nest_end(skb, nest);
4343 nlmsg_end(skb, nlh);
4347 nlmsg_trim(skb, nlh);
4351 static void nf_tables_set_notify(const struct nft_ctx *ctx,
4352 const struct nft_set *set, int event,
4355 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
4356 u32 portid = ctx->portid;
4357 struct sk_buff *skb;
4362 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
4365 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
4369 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4370 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4372 err = nf_tables_fill_set(skb, ctx, set, event, flags);
4378 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
4381 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
4384 static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
4386 const struct nft_set *set;
4387 unsigned int idx, s_idx = cb->args[0];
4388 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4389 struct net *net = sock_net(skb->sk);
4390 struct nft_ctx *ctx = cb->data, ctx_set;
4391 struct nftables_pernet *nft_net;
4397 nft_net = nft_pernet(net);
4398 cb->seq = READ_ONCE(nft_net->base_seq);
4400 list_for_each_entry_rcu(table, &nft_net->tables, list) {
4401 if (ctx->family != NFPROTO_UNSPEC &&
4402 ctx->family != table->family)
4405 if (ctx->table && ctx->table != table)
4409 if (cur_table != table)
4415 list_for_each_entry_rcu(set, &table->sets, list) {
4418 if (!nft_is_active(net, set))
4422 ctx_set.table = table;
4423 ctx_set.family = table->family;
4425 if (nf_tables_fill_set(skb, &ctx_set, set,
4429 cb->args[2] = (unsigned long) table;
4432 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4445 static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4447 struct nft_ctx *ctx_dump = NULL;
4449 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4450 if (ctx_dump == NULL)
4453 cb->data = ctx_dump;
4457 static int nf_tables_dump_sets_done(struct netlink_callback *cb)
4463 /* called with rcu_read_lock held */
4464 static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4465 const struct nlattr * const nla[])
4467 struct netlink_ext_ack *extack = info->extack;
4468 u8 genmask = nft_genmask_cur(info->net);
4469 u8 family = info->nfmsg->nfgen_family;
4470 struct nft_table *table = NULL;
4471 struct net *net = info->net;
4472 const struct nft_set *set;
4473 struct sk_buff *skb2;
4477 if (nla[NFTA_SET_TABLE]) {
4478 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4480 if (IS_ERR(table)) {
4481 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4482 return PTR_ERR(table);
4486 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4488 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
4489 struct netlink_dump_control c = {
4490 .start = nf_tables_dump_sets_start,
4491 .dump = nf_tables_dump_sets,
4492 .done = nf_tables_dump_sets_done,
4494 .module = THIS_MODULE,
4497 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
4500 /* Only accept unspec with dump */
4501 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
4502 return -EAFNOSUPPORT;
4503 if (!nla[NFTA_SET_TABLE])
4506 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
4508 return PTR_ERR(set);
4510 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
4514 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4516 goto err_fill_set_info;
4518 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
4525 static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4526 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4529 static int nft_set_desc_concat_parse(const struct nlattr *attr,
4530 struct nft_set_desc *desc)
4532 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4536 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4539 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4540 nft_concat_policy, NULL);
4544 if (!tb[NFTA_SET_FIELD_LEN])
4547 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
4548 if (!len || len > U8_MAX)
4551 desc->field_len[desc->field_count++] = len;
4556 static int nft_set_desc_concat(struct nft_set_desc *desc,
4557 const struct nlattr *nla)
4559 struct nlattr *attr;
4563 nla_for_each_nested(attr, nla, rem) {
4564 if (nla_type(attr) != NFTA_LIST_ELEM)
4567 err = nft_set_desc_concat_parse(attr, desc);
4572 for (i = 0; i < desc->field_count; i++)
4573 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4575 if (num_regs > NFT_REG32_COUNT)
4581 static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
4582 const struct nlattr *nla)
4584 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4587 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4588 nft_set_desc_policy, NULL);
4592 if (da[NFTA_SET_DESC_SIZE] != NULL)
4593 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
4594 if (da[NFTA_SET_DESC_CONCAT])
4595 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
4600 static int nft_set_expr_alloc(struct nft_ctx *ctx, struct nft_set *set,
4601 const struct nlattr * const *nla,
4602 struct nft_expr **exprs, int *num_exprs,
4605 struct nft_expr *expr;
4608 if (nla[NFTA_SET_EXPR]) {
4609 expr = nft_set_elem_expr_alloc(ctx, set, nla[NFTA_SET_EXPR]);
4611 err = PTR_ERR(expr);
4612 goto err_set_expr_alloc;
4616 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4620 if (!(flags & NFT_SET_EXPR)) {
4622 goto err_set_expr_alloc;
4625 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4626 if (i == NFT_SET_EXPR_MAX) {
4628 goto err_set_expr_alloc;
4630 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4632 goto err_set_expr_alloc;
4634 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
4636 err = PTR_ERR(expr);
4637 goto err_set_expr_alloc;
4647 for (i = 0; i < *num_exprs; i++)
4648 nft_expr_destroy(ctx, exprs[i]);
4653 static bool nft_set_is_same(const struct nft_set *set,
4654 const struct nft_set_desc *desc,
4655 struct nft_expr *exprs[], u32 num_exprs, u32 flags)
4659 if (set->ktype != desc->ktype ||
4660 set->dtype != desc->dtype ||
4661 set->flags != flags ||
4662 set->klen != desc->klen ||
4663 set->dlen != desc->dlen ||
4664 set->field_count != desc->field_count ||
4665 set->num_exprs != num_exprs)
4668 for (i = 0; i < desc->field_count; i++) {
4669 if (set->field_len[i] != desc->field_len[i])
4673 for (i = 0; i < num_exprs; i++) {
4674 if (set->exprs[i]->ops != exprs[i]->ops)
4681 static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4682 const struct nlattr * const nla[])
4684 struct netlink_ext_ack *extack = info->extack;
4685 u8 genmask = nft_genmask_next(info->net);
4686 u8 family = info->nfmsg->nfgen_family;
4687 const struct nft_set_ops *ops;
4688 struct net *net = info->net;
4689 struct nft_set_desc desc;
4690 struct nft_table *table;
4691 unsigned char *udata;
4692 struct nft_set *set;
4702 if (nla[NFTA_SET_TABLE] == NULL ||
4703 nla[NFTA_SET_NAME] == NULL ||
4704 nla[NFTA_SET_KEY_LEN] == NULL ||
4705 nla[NFTA_SET_ID] == NULL)
4708 memset(&desc, 0, sizeof(desc));
4710 desc.ktype = NFT_DATA_VALUE;
4711 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
4712 desc.ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4713 if ((desc.ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
4717 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
4718 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
4722 if (nla[NFTA_SET_FLAGS] != NULL) {
4723 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4724 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
4725 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
4726 NFT_SET_MAP | NFT_SET_EVAL |
4727 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
4729 /* Only one of these operations is supported */
4730 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4731 (NFT_SET_MAP | NFT_SET_OBJECT))
4733 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4734 (NFT_SET_EVAL | NFT_SET_OBJECT))
4739 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4740 if (!(flags & NFT_SET_MAP))
4743 desc.dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4744 if ((desc.dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4745 desc.dtype != NFT_DATA_VERDICT)
4748 if (desc.dtype != NFT_DATA_VERDICT) {
4749 if (nla[NFTA_SET_DATA_LEN] == NULL)
4751 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
4752 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
4755 desc.dlen = sizeof(struct nft_verdict);
4756 } else if (flags & NFT_SET_MAP)
4759 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4760 if (!(flags & NFT_SET_OBJECT))
4763 desc.objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4764 if (desc.objtype == NFT_OBJECT_UNSPEC ||
4765 desc.objtype > NFT_OBJECT_MAX)
4767 } else if (flags & NFT_SET_OBJECT)
4770 desc.objtype = NFT_OBJECT_UNSPEC;
4773 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4774 if (!(flags & NFT_SET_TIMEOUT))
4777 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &desc.timeout);
4782 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4783 if (!(flags & NFT_SET_TIMEOUT))
4785 desc.gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
4788 desc.policy = NFT_SET_POL_PERFORMANCE;
4789 if (nla[NFTA_SET_POLICY] != NULL)
4790 desc.policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
4792 if (nla[NFTA_SET_DESC] != NULL) {
4793 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
4797 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4799 } else if (flags & NFT_SET_CONCAT) {
4803 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
4806 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4807 NETLINK_CB(skb).portid);
4808 if (IS_ERR(table)) {
4809 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4810 return PTR_ERR(table);
4813 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4815 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
4817 if (PTR_ERR(set) != -ENOENT) {
4818 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4819 return PTR_ERR(set);
4822 struct nft_expr *exprs[NFT_SET_EXPR_MAX] = {};
4824 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
4825 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4828 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
4831 err = nft_set_expr_alloc(&ctx, set, nla, exprs, &num_exprs, flags);
4836 if (!nft_set_is_same(set, &desc, exprs, num_exprs, flags)) {
4837 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4841 for (i = 0; i < num_exprs; i++)
4842 nft_expr_destroy(&ctx, exprs[i]);
4847 return __nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set, &desc);
4850 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
4853 ops = nft_select_set_ops(&ctx, nla, &desc);
4855 return PTR_ERR(ops);
4858 if (nla[NFTA_SET_USERDATA])
4859 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4862 if (ops->privsize != NULL)
4863 size = ops->privsize(nla, &desc);
4864 alloc_size = sizeof(*set) + size + udlen;
4865 if (alloc_size < size || alloc_size > INT_MAX)
4867 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
4871 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
4877 err = nf_tables_set_alloc_name(&ctx, set, name);
4884 udata = set->data + size;
4885 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
4888 INIT_LIST_HEAD(&set->bindings);
4889 INIT_LIST_HEAD(&set->catchall_list);
4891 write_pnet(&set->net, net);
4893 set->ktype = desc.ktype;
4894 set->klen = desc.klen;
4895 set->dtype = desc.dtype;
4896 set->objtype = desc.objtype;
4897 set->dlen = desc.dlen;
4899 set->size = desc.size;
4900 set->policy = desc.policy;
4903 set->timeout = desc.timeout;
4904 set->gc_int = desc.gc_int;
4906 set->field_count = desc.field_count;
4907 for (i = 0; i < desc.field_count; i++)
4908 set->field_len[i] = desc.field_len[i];
4910 err = ops->init(set, &desc, nla);
4914 err = nft_set_expr_alloc(&ctx, set, nla, set->exprs, &num_exprs, flags);
4916 goto err_set_destroy;
4918 set->num_exprs = num_exprs;
4919 set->handle = nf_tables_alloc_handle(table);
4921 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
4923 goto err_set_expr_alloc;
4925 list_add_tail_rcu(&set->list, &table->sets);
4930 for (i = 0; i < set->num_exprs; i++)
4931 nft_expr_destroy(&ctx, set->exprs[i]);
4941 static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
4942 struct nft_set *set)
4944 struct nft_set_elem_catchall *next, *catchall;
4946 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
4947 list_del_rcu(&catchall->list);
4948 nft_set_elem_destroy(set, catchall->elem, true);
4949 kfree_rcu(catchall, rcu);
4953 static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
4957 if (WARN_ON(set->use > 0))
4960 for (i = 0; i < set->num_exprs; i++)
4961 nft_expr_destroy(ctx, set->exprs[i]);
4963 set->ops->destroy(set);
4964 nft_set_catchall_destroy(ctx, set);
4969 static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
4970 const struct nlattr * const nla[])
4972 struct netlink_ext_ack *extack = info->extack;
4973 u8 genmask = nft_genmask_next(info->net);
4974 u8 family = info->nfmsg->nfgen_family;
4975 struct net *net = info->net;
4976 const struct nlattr *attr;
4977 struct nft_table *table;
4978 struct nft_set *set;
4981 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
4982 return -EAFNOSUPPORT;
4984 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4985 genmask, NETLINK_CB(skb).portid);
4986 if (IS_ERR(table)) {
4987 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4988 return PTR_ERR(table);
4991 if (nla[NFTA_SET_HANDLE]) {
4992 attr = nla[NFTA_SET_HANDLE];
4993 set = nft_set_lookup_byhandle(table, attr, genmask);
4995 attr = nla[NFTA_SET_NAME];
4996 set = nft_set_lookup(table, attr, genmask);
5000 if (PTR_ERR(set) == -ENOENT &&
5001 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
5004 NL_SET_BAD_ATTR(extack, attr);
5005 return PTR_ERR(set);
5008 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
5009 atomic_read(&set->nelems) > 0)) {
5010 NL_SET_BAD_ATTR(extack, attr);
5014 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5016 return nft_delset(&ctx, set);
5019 static int nft_validate_register_store(const struct nft_ctx *ctx,
5020 enum nft_registers reg,
5021 const struct nft_data *data,
5022 enum nft_data_types type,
5025 static int nft_setelem_data_validate(const struct nft_ctx *ctx,
5026 struct nft_set *set,
5027 struct nft_set_elem *elem)
5029 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5030 enum nft_registers dreg;
5032 dreg = nft_type_to_reg(set->dtype);
5033 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
5034 set->dtype == NFT_DATA_VERDICT ?
5035 NFT_DATA_VERDICT : NFT_DATA_VALUE,
5039 static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
5040 struct nft_set *set,
5041 const struct nft_set_iter *iter,
5042 struct nft_set_elem *elem)
5044 return nft_setelem_data_validate(ctx, set, elem);
5047 static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
5048 struct nft_set *set)
5050 u8 genmask = nft_genmask_next(ctx->net);
5051 struct nft_set_elem_catchall *catchall;
5052 struct nft_set_elem elem;
5053 struct nft_set_ext *ext;
5056 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5057 ext = nft_set_elem_ext(set, catchall->elem);
5058 if (!nft_set_elem_active(ext, genmask))
5061 elem.priv = catchall->elem;
5062 ret = nft_setelem_data_validate(ctx, set, &elem);
5070 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
5071 struct nft_set_binding *binding)
5073 struct nft_set_binding *i;
5074 struct nft_set_iter iter;
5076 if (set->use == UINT_MAX)
5079 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
5082 if (binding->flags & NFT_SET_MAP) {
5083 /* If the set is already bound to the same chain all
5084 * jumps are already validated for that chain.
5086 list_for_each_entry(i, &set->bindings, list) {
5087 if (i->flags & NFT_SET_MAP &&
5088 i->chain == binding->chain)
5092 iter.genmask = nft_genmask_next(ctx->net);
5096 iter.fn = nf_tables_bind_check_setelem;
5098 set->ops->walk(ctx, set, &iter);
5100 iter.err = nft_set_catchall_bind_check(ctx, set);
5106 binding->chain = ctx->chain;
5107 list_add_tail_rcu(&binding->list, &set->bindings);
5108 nft_set_trans_bind(ctx, set);
5113 EXPORT_SYMBOL_GPL(nf_tables_bind_set);
5115 static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
5116 struct nft_set_binding *binding, bool event)
5118 list_del_rcu(&binding->list);
5120 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
5121 list_del_rcu(&set->list);
5123 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
5128 void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set)
5130 if (nft_set_is_anonymous(set))
5131 nft_clear(ctx->net, set);
5135 EXPORT_SYMBOL_GPL(nf_tables_activate_set);
5137 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
5138 struct nft_set_binding *binding,
5139 enum nft_trans_phase phase)
5142 case NFT_TRANS_PREPARE:
5143 if (nft_set_is_anonymous(set))
5144 nft_deactivate_next(ctx->net, set);
5148 case NFT_TRANS_ABORT:
5149 case NFT_TRANS_RELEASE:
5153 nf_tables_unbind_set(ctx, set, binding,
5154 phase == NFT_TRANS_COMMIT);
5157 EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
5159 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
5161 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
5162 nft_set_destroy(ctx, set);
5164 EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
5166 const struct nft_set_ext_type nft_set_ext_types[] = {
5167 [NFT_SET_EXT_KEY] = {
5168 .align = __alignof__(u32),
5170 [NFT_SET_EXT_DATA] = {
5171 .align = __alignof__(u32),
5173 [NFT_SET_EXT_EXPRESSIONS] = {
5174 .align = __alignof__(struct nft_set_elem_expr),
5176 [NFT_SET_EXT_OBJREF] = {
5177 .len = sizeof(struct nft_object *),
5178 .align = __alignof__(struct nft_object *),
5180 [NFT_SET_EXT_FLAGS] = {
5182 .align = __alignof__(u8),
5184 [NFT_SET_EXT_TIMEOUT] = {
5186 .align = __alignof__(u64),
5188 [NFT_SET_EXT_EXPIRATION] = {
5190 .align = __alignof__(u64),
5192 [NFT_SET_EXT_USERDATA] = {
5193 .len = sizeof(struct nft_userdata),
5194 .align = __alignof__(struct nft_userdata),
5196 [NFT_SET_EXT_KEY_END] = {
5197 .align = __alignof__(u32),
5205 static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
5206 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
5207 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
5208 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
5209 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
5210 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
5211 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
5212 .len = NFT_USERDATA_MAXLEN },
5213 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
5214 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
5215 .len = NFT_OBJ_MAXNAMELEN - 1 },
5216 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
5217 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
5220 static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
5221 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
5222 .len = NFT_TABLE_MAXNAMELEN - 1 },
5223 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
5224 .len = NFT_SET_MAXNAMELEN - 1 },
5225 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
5226 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
5229 static int nft_set_elem_expr_dump(struct sk_buff *skb,
5230 const struct nft_set *set,
5231 const struct nft_set_ext *ext)
5233 struct nft_set_elem_expr *elem_expr;
5234 u32 size, num_exprs = 0;
5235 struct nft_expr *expr;
5236 struct nlattr *nest;
5238 elem_expr = nft_set_ext_expr(ext);
5239 nft_setelem_expr_foreach(expr, elem_expr, size)
5242 if (num_exprs == 1) {
5243 expr = nft_setelem_expr_at(elem_expr, 0);
5244 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, false) < 0)
5248 } else if (num_exprs > 1) {
5249 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
5251 goto nla_put_failure;
5253 nft_setelem_expr_foreach(expr, elem_expr, size) {
5254 expr = nft_setelem_expr_at(elem_expr, size);
5255 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, false) < 0)
5256 goto nla_put_failure;
5258 nla_nest_end(skb, nest);
5266 static int nf_tables_fill_setelem(struct sk_buff *skb,
5267 const struct nft_set *set,
5268 const struct nft_set_elem *elem)
5270 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5271 unsigned char *b = skb_tail_pointer(skb);
5272 struct nlattr *nest;
5274 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
5276 goto nla_put_failure;
5278 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5279 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
5280 NFT_DATA_VALUE, set->klen) < 0)
5281 goto nla_put_failure;
5283 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5284 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5285 NFT_DATA_VALUE, set->klen) < 0)
5286 goto nla_put_failure;
5288 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5289 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
5290 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5292 goto nla_put_failure;
5294 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
5295 nft_set_elem_expr_dump(skb, set, ext))
5296 goto nla_put_failure;
5298 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5299 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
5300 (*nft_set_ext_obj(ext))->key.name) < 0)
5301 goto nla_put_failure;
5303 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5304 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5305 htonl(*nft_set_ext_flags(ext))))
5306 goto nla_put_failure;
5308 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
5309 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
5310 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
5312 goto nla_put_failure;
5314 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5315 u64 expires, now = get_jiffies_64();
5317 expires = *nft_set_ext_expiration(ext);
5318 if (time_before64(now, expires))
5323 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
5324 nf_jiffies64_to_msecs(expires),
5326 goto nla_put_failure;
5329 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5330 struct nft_userdata *udata;
5332 udata = nft_set_ext_userdata(ext);
5333 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5334 udata->len + 1, udata->data))
5335 goto nla_put_failure;
5338 nla_nest_end(skb, nest);
5346 struct nft_set_dump_args {
5347 const struct netlink_callback *cb;
5348 struct nft_set_iter iter;
5349 struct sk_buff *skb;
5352 static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
5353 struct nft_set *set,
5354 const struct nft_set_iter *iter,
5355 struct nft_set_elem *elem)
5357 struct nft_set_dump_args *args;
5359 args = container_of(iter, struct nft_set_dump_args, iter);
5360 return nf_tables_fill_setelem(args->skb, set, elem);
5363 struct nft_set_dump_ctx {
5364 const struct nft_set *set;
5368 static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5369 const struct nft_set *set)
5371 struct nft_set_elem_catchall *catchall;
5372 u8 genmask = nft_genmask_cur(net);
5373 struct nft_set_elem elem;
5374 struct nft_set_ext *ext;
5377 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5378 ext = nft_set_elem_ext(set, catchall->elem);
5379 if (!nft_set_elem_active(ext, genmask) ||
5380 nft_set_elem_expired(ext))
5383 elem.priv = catchall->elem;
5384 ret = nf_tables_fill_setelem(skb, set, &elem);
5391 static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5393 struct nft_set_dump_ctx *dump_ctx = cb->data;
5394 struct net *net = sock_net(skb->sk);
5395 struct nftables_pernet *nft_net;
5396 struct nft_table *table;
5397 struct nft_set *set;
5398 struct nft_set_dump_args args;
5399 bool set_found = false;
5400 struct nlmsghdr *nlh;
5401 struct nlattr *nest;
5406 nft_net = nft_pernet(net);
5407 cb->seq = READ_ONCE(nft_net->base_seq);
5409 list_for_each_entry_rcu(table, &nft_net->tables, list) {
5410 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
5411 dump_ctx->ctx.family != table->family)
5414 if (table != dump_ctx->ctx.table)
5417 list_for_each_entry_rcu(set, &table->sets, list) {
5418 if (set == dump_ctx->set) {
5431 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
5432 portid = NETLINK_CB(cb->skb).portid;
5433 seq = cb->nlh->nlmsg_seq;
5435 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5436 table->family, NFNETLINK_V0, nft_base_seq(net));
5438 goto nla_put_failure;
5440 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
5441 goto nla_put_failure;
5442 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5443 goto nla_put_failure;
5445 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
5447 goto nla_put_failure;
5451 args.iter.genmask = nft_genmask_cur(net);
5452 args.iter.skip = cb->args[0];
5453 args.iter.count = 0;
5455 args.iter.fn = nf_tables_dump_setelem;
5456 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
5458 if (!args.iter.err && args.iter.count == cb->args[0])
5459 args.iter.err = nft_set_catchall_dump(net, skb, set);
5462 nla_nest_end(skb, nest);
5463 nlmsg_end(skb, nlh);
5465 if (args.iter.err && args.iter.err != -EMSGSIZE)
5466 return args.iter.err;
5467 if (args.iter.count == cb->args[0])
5470 cb->args[0] = args.iter.count;
5478 static int nf_tables_dump_set_start(struct netlink_callback *cb)
5480 struct nft_set_dump_ctx *dump_ctx = cb->data;
5482 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5484 return cb->data ? 0 : -ENOMEM;
5487 static int nf_tables_dump_set_done(struct netlink_callback *cb)
5493 static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5494 const struct nft_ctx *ctx, u32 seq,
5495 u32 portid, int event, u16 flags,
5496 const struct nft_set *set,
5497 const struct nft_set_elem *elem)
5499 struct nlmsghdr *nlh;
5500 struct nlattr *nest;
5503 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
5504 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5505 NFNETLINK_V0, nft_base_seq(ctx->net));
5507 goto nla_put_failure;
5509 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5510 goto nla_put_failure;
5511 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5512 goto nla_put_failure;
5514 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
5516 goto nla_put_failure;
5518 err = nf_tables_fill_setelem(skb, set, elem);
5520 goto nla_put_failure;
5522 nla_nest_end(skb, nest);
5524 nlmsg_end(skb, nlh);
5528 nlmsg_trim(skb, nlh);
5532 static int nft_setelem_parse_flags(const struct nft_set *set,
5533 const struct nlattr *attr, u32 *flags)
5538 *flags = ntohl(nla_get_be32(attr));
5539 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5541 if (!(set->flags & NFT_SET_INTERVAL) &&
5542 *flags & NFT_SET_ELEM_INTERVAL_END)
5544 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5545 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5551 static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5552 struct nft_data *key, struct nlattr *attr)
5554 struct nft_data_desc desc = {
5555 .type = NFT_DATA_VALUE,
5556 .size = NFT_DATA_VALUE_MAXLEN,
5560 return nft_data_init(ctx, key, &desc, attr);
5563 static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5564 struct nft_data_desc *desc,
5565 struct nft_data *data,
5566 struct nlattr *attr)
5570 if (set->dtype == NFT_DATA_VERDICT)
5571 dtype = NFT_DATA_VERDICT;
5573 dtype = NFT_DATA_VALUE;
5576 desc->size = NFT_DATA_VALUE_MAXLEN;
5577 desc->len = set->dlen;
5578 desc->flags = NFT_DATA_DESC_SETELEM;
5580 return nft_data_init(ctx, data, desc, attr);
5583 static void *nft_setelem_catchall_get(const struct net *net,
5584 const struct nft_set *set)
5586 struct nft_set_elem_catchall *catchall;
5587 u8 genmask = nft_genmask_cur(net);
5588 struct nft_set_ext *ext;
5591 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5592 ext = nft_set_elem_ext(set, catchall->elem);
5593 if (!nft_set_elem_active(ext, genmask) ||
5594 nft_set_elem_expired(ext))
5597 priv = catchall->elem;
5604 static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5605 struct nft_set_elem *elem, u32 flags)
5609 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5610 priv = set->ops->get(ctx->net, set, elem, flags);
5612 return PTR_ERR(priv);
5614 priv = nft_setelem_catchall_get(ctx->net, set);
5623 static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5624 const struct nlattr *attr)
5626 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
5627 struct nft_set_elem elem;
5628 struct sk_buff *skb;
5632 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5633 nft_set_elem_policy, NULL);
5637 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5641 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5644 if (nla[NFTA_SET_ELEM_KEY]) {
5645 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5646 nla[NFTA_SET_ELEM_KEY]);
5651 if (nla[NFTA_SET_ELEM_KEY_END]) {
5652 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5653 nla[NFTA_SET_ELEM_KEY_END]);
5658 err = nft_setelem_get(ctx, set, &elem, flags);
5663 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
5667 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5668 NFT_MSG_NEWSETELEM, 0, set, &elem);
5670 goto err_fill_setelem;
5672 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
5679 /* called with rcu_read_lock held */
5680 static int nf_tables_getsetelem(struct sk_buff *skb,
5681 const struct nfnl_info *info,
5682 const struct nlattr * const nla[])
5684 struct netlink_ext_ack *extack = info->extack;
5685 u8 genmask = nft_genmask_cur(info->net);
5686 u8 family = info->nfmsg->nfgen_family;
5687 struct net *net = info->net;
5688 struct nft_table *table;
5689 struct nft_set *set;
5690 struct nlattr *attr;
5694 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
5696 if (IS_ERR(table)) {
5697 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5698 return PTR_ERR(table);
5701 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
5703 return PTR_ERR(set);
5705 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5707 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
5708 struct netlink_dump_control c = {
5709 .start = nf_tables_dump_set_start,
5710 .dump = nf_tables_dump_set,
5711 .done = nf_tables_dump_set_done,
5712 .module = THIS_MODULE,
5714 struct nft_set_dump_ctx dump_ctx = {
5720 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
5723 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5726 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5727 err = nft_get_set_elem(&ctx, set, attr);
5729 NL_SET_BAD_ATTR(extack, attr);
5737 static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5738 const struct nft_set *set,
5739 const struct nft_set_elem *elem,
5742 struct nftables_pernet *nft_net;
5743 struct net *net = ctx->net;
5744 u32 portid = ctx->portid;
5745 struct sk_buff *skb;
5749 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
5752 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5756 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5757 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5759 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5766 nft_net = nft_pernet(net);
5767 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
5770 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
5773 static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5775 struct nft_set *set)
5777 struct nft_trans *trans;
5779 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5783 nft_trans_elem_set(trans) = set;
5787 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5788 const struct nft_set *set,
5789 const struct nlattr *attr)
5791 struct nft_expr *expr;
5794 expr = nft_expr_init(ctx, attr);
5799 if (expr->ops->type->flags & NFT_EXPR_GC) {
5800 if (set->flags & NFT_SET_TIMEOUT)
5801 goto err_set_elem_expr;
5802 if (!set->ops->gc_init)
5803 goto err_set_elem_expr;
5804 set->ops->gc_init(set);
5810 nft_expr_destroy(ctx, expr);
5811 return ERR_PTR(err);
5814 static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
5816 len += nft_set_ext_types[id].len;
5817 if (len > tmpl->ext_len[id] ||
5824 static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
5825 void *to, const void *from, u32 len)
5827 if (nft_set_ext_check(tmpl, id, len) < 0)
5830 memcpy(to, from, len);
5835 void *nft_set_elem_init(const struct nft_set *set,
5836 const struct nft_set_ext_tmpl *tmpl,
5837 const u32 *key, const u32 *key_end,
5838 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
5840 struct nft_set_ext *ext;
5843 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
5845 return ERR_PTR(-ENOMEM);
5847 ext = nft_set_elem_ext(set, elem);
5848 nft_set_ext_init(ext, tmpl);
5850 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5851 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
5852 nft_set_ext_key(ext), key, set->klen) < 0)
5855 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5856 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
5857 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
5860 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5861 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
5862 nft_set_ext_data(ext), data, set->dlen) < 0)
5865 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5866 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
5867 if (expiration == 0)
5868 *nft_set_ext_expiration(ext) += timeout;
5870 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
5871 *nft_set_ext_timeout(ext) = timeout;
5878 return ERR_PTR(-EINVAL);
5881 static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5882 struct nft_expr *expr)
5884 if (expr->ops->destroy_clone) {
5885 expr->ops->destroy_clone(ctx, expr);
5886 module_put(expr->ops->type->owner);
5888 nf_tables_expr_destroy(ctx, expr);
5892 static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5893 struct nft_set_elem_expr *elem_expr)
5895 struct nft_expr *expr;
5898 nft_setelem_expr_foreach(expr, elem_expr, size)
5899 __nft_set_elem_expr_destroy(ctx, expr);
5902 void nft_set_elem_destroy(const struct nft_set *set, void *elem,
5905 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5906 struct nft_ctx ctx = {
5907 .net = read_pnet(&set->net),
5908 .family = set->table->family,
5911 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
5912 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
5913 nft_data_release(nft_set_ext_data(ext), set->dtype);
5914 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
5915 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
5917 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
5918 (*nft_set_ext_obj(ext))->use--;
5921 EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
5923 /* Only called from commit path, nft_setelem_data_deactivate() already deals
5924 * with the refcounting from the preparation phase.
5926 static void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
5927 const struct nft_set *set, void *elem)
5929 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5931 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
5932 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
5937 int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
5938 struct nft_expr *expr_array[])
5940 struct nft_expr *expr;
5943 for (i = 0; i < set->num_exprs; i++) {
5944 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
5948 err = nft_expr_clone(expr, set->exprs[i]);
5953 expr_array[i] = expr;
5959 for (k = i - 1; k >= 0; k--)
5960 nft_expr_destroy(ctx, expr_array[k]);
5965 static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
5966 const struct nft_set_ext_tmpl *tmpl,
5967 const struct nft_set_ext *ext,
5968 struct nft_expr *expr_array[],
5971 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
5972 u32 len = sizeof(struct nft_set_elem_expr);
5973 struct nft_expr *expr;
5979 for (i = 0; i < num_exprs; i++)
5980 len += expr_array[i]->ops->size;
5982 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
5985 for (i = 0; i < num_exprs; i++) {
5986 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
5987 err = nft_expr_clone(expr, expr_array[i]);
5989 goto err_elem_expr_setup;
5991 elem_expr->size += expr_array[i]->ops->size;
5992 nft_expr_destroy(ctx, expr_array[i]);
5993 expr_array[i] = NULL;
5998 err_elem_expr_setup:
5999 for (; i < num_exprs; i++) {
6000 nft_expr_destroy(ctx, expr_array[i]);
6001 expr_array[i] = NULL;
6007 struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
6008 const struct nft_set *set)
6010 struct nft_set_elem_catchall *catchall;
6011 u8 genmask = nft_genmask_cur(net);
6012 struct nft_set_ext *ext;
6014 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6015 ext = nft_set_elem_ext(set, catchall->elem);
6016 if (nft_set_elem_active(ext, genmask) &&
6017 !nft_set_elem_expired(ext))
6023 EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
6025 void *nft_set_catchall_gc(const struct nft_set *set)
6027 struct nft_set_elem_catchall *catchall, *next;
6028 struct nft_set_ext *ext;
6031 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6032 ext = nft_set_elem_ext(set, catchall->elem);
6034 if (!nft_set_elem_expired(ext) ||
6035 nft_set_elem_mark_busy(ext))
6038 elem = catchall->elem;
6039 list_del_rcu(&catchall->list);
6040 kfree_rcu(catchall, rcu);
6046 EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
6048 static int nft_setelem_catchall_insert(const struct net *net,
6049 struct nft_set *set,
6050 const struct nft_set_elem *elem,
6051 struct nft_set_ext **pext)
6053 struct nft_set_elem_catchall *catchall;
6054 u8 genmask = nft_genmask_next(net);
6055 struct nft_set_ext *ext;
6057 list_for_each_entry(catchall, &set->catchall_list, list) {
6058 ext = nft_set_elem_ext(set, catchall->elem);
6059 if (nft_set_elem_active(ext, genmask)) {
6065 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
6069 catchall->elem = elem->priv;
6070 list_add_tail_rcu(&catchall->list, &set->catchall_list);
6075 static int nft_setelem_insert(const struct net *net,
6076 struct nft_set *set,
6077 const struct nft_set_elem *elem,
6078 struct nft_set_ext **ext, unsigned int flags)
6082 if (flags & NFT_SET_ELEM_CATCHALL)
6083 ret = nft_setelem_catchall_insert(net, set, elem, ext);
6085 ret = set->ops->insert(net, set, elem, ext);
6090 static bool nft_setelem_is_catchall(const struct nft_set *set,
6091 const struct nft_set_elem *elem)
6093 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6095 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
6096 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
6102 static void nft_setelem_activate(struct net *net, struct nft_set *set,
6103 struct nft_set_elem *elem)
6105 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6107 if (nft_setelem_is_catchall(set, elem)) {
6108 nft_set_elem_change_active(net, set, ext);
6109 nft_set_elem_clear_busy(ext);
6111 set->ops->activate(net, set, elem);
6115 static int nft_setelem_catchall_deactivate(const struct net *net,
6116 struct nft_set *set,
6117 struct nft_set_elem *elem)
6119 struct nft_set_elem_catchall *catchall;
6120 struct nft_set_ext *ext;
6122 list_for_each_entry(catchall, &set->catchall_list, list) {
6123 ext = nft_set_elem_ext(set, catchall->elem);
6124 if (!nft_is_active(net, ext) ||
6125 nft_set_elem_mark_busy(ext))
6129 elem->priv = catchall->elem;
6130 nft_set_elem_change_active(net, set, ext);
6137 static int __nft_setelem_deactivate(const struct net *net,
6138 struct nft_set *set,
6139 struct nft_set_elem *elem)
6143 priv = set->ops->deactivate(net, set, elem);
6154 static int nft_setelem_deactivate(const struct net *net,
6155 struct nft_set *set,
6156 struct nft_set_elem *elem, u32 flags)
6160 if (flags & NFT_SET_ELEM_CATCHALL)
6161 ret = nft_setelem_catchall_deactivate(net, set, elem);
6163 ret = __nft_setelem_deactivate(net, set, elem);
6168 static void nft_setelem_catchall_remove(const struct net *net,
6169 const struct nft_set *set,
6170 const struct nft_set_elem *elem)
6172 struct nft_set_elem_catchall *catchall, *next;
6174 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6175 if (catchall->elem == elem->priv) {
6176 list_del_rcu(&catchall->list);
6177 kfree_rcu(catchall, rcu);
6183 static void nft_setelem_remove(const struct net *net,
6184 const struct nft_set *set,
6185 const struct nft_set_elem *elem)
6187 if (nft_setelem_is_catchall(set, elem))
6188 nft_setelem_catchall_remove(net, set, elem);
6190 set->ops->remove(net, set, elem);
6193 static bool nft_setelem_valid_key_end(const struct nft_set *set,
6194 struct nlattr **nla, u32 flags)
6196 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
6197 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
6198 if (flags & NFT_SET_ELEM_INTERVAL_END)
6201 if (nla[NFTA_SET_ELEM_KEY_END] &&
6202 flags & NFT_SET_ELEM_CATCHALL)
6205 if (nla[NFTA_SET_ELEM_KEY_END])
6212 static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
6213 const struct nlattr *attr, u32 nlmsg_flags)
6215 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
6216 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
6217 u8 genmask = nft_genmask_next(ctx->net);
6218 u32 flags = 0, size = 0, num_exprs = 0;
6219 struct nft_set_ext_tmpl tmpl;
6220 struct nft_set_ext *ext, *ext2;
6221 struct nft_set_elem elem;
6222 struct nft_set_binding *binding;
6223 struct nft_object *obj = NULL;
6224 struct nft_userdata *udata;
6225 struct nft_data_desc desc;
6226 enum nft_registers dreg;
6227 struct nft_trans *trans;
6233 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6234 nft_set_elem_policy, NULL);
6238 nft_set_ext_prepare(&tmpl);
6240 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6244 if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
6245 (!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
6249 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6254 if (set->flags & NFT_SET_MAP) {
6255 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
6256 !(flags & NFT_SET_ELEM_INTERVAL_END))
6259 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6263 if (set->flags & NFT_SET_OBJECT) {
6264 if (!nla[NFTA_SET_ELEM_OBJREF] &&
6265 !(flags & NFT_SET_ELEM_INTERVAL_END))
6268 if (nla[NFTA_SET_ELEM_OBJREF])
6272 if (!nft_setelem_valid_key_end(set, nla, flags))
6275 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
6276 (nla[NFTA_SET_ELEM_DATA] ||
6277 nla[NFTA_SET_ELEM_OBJREF] ||
6278 nla[NFTA_SET_ELEM_TIMEOUT] ||
6279 nla[NFTA_SET_ELEM_EXPIRATION] ||
6280 nla[NFTA_SET_ELEM_USERDATA] ||
6281 nla[NFTA_SET_ELEM_EXPR] ||
6282 nla[NFTA_SET_ELEM_KEY_END] ||
6283 nla[NFTA_SET_ELEM_EXPRESSIONS]))
6287 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6288 if (!(set->flags & NFT_SET_TIMEOUT))
6290 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6294 } else if (set->flags & NFT_SET_TIMEOUT &&
6295 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
6296 timeout = READ_ONCE(set->timeout);
6300 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6301 if (!(set->flags & NFT_SET_TIMEOUT))
6303 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6309 if (nla[NFTA_SET_ELEM_EXPR]) {
6310 struct nft_expr *expr;
6312 if (set->num_exprs && set->num_exprs != 1)
6315 expr = nft_set_elem_expr_alloc(ctx, set,
6316 nla[NFTA_SET_ELEM_EXPR]);
6318 return PTR_ERR(expr);
6320 expr_array[0] = expr;
6323 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
6325 goto err_set_elem_expr;
6327 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6328 struct nft_expr *expr;
6333 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
6334 if (i == NFT_SET_EXPR_MAX ||
6335 (set->num_exprs && set->num_exprs == i)) {
6337 goto err_set_elem_expr;
6339 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6341 goto err_set_elem_expr;
6343 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6345 err = PTR_ERR(expr);
6346 goto err_set_elem_expr;
6348 expr_array[i] = expr;
6351 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
6353 goto err_set_elem_expr;
6357 if (set->num_exprs && set->num_exprs != i) {
6359 goto err_set_elem_expr;
6361 } else if (set->num_exprs > 0 &&
6362 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
6363 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6365 goto err_set_elem_expr_clone;
6367 num_exprs = set->num_exprs;
6370 if (nla[NFTA_SET_ELEM_KEY]) {
6371 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6372 nla[NFTA_SET_ELEM_KEY]);
6374 goto err_set_elem_expr;
6376 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6381 if (nla[NFTA_SET_ELEM_KEY_END]) {
6382 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6383 nla[NFTA_SET_ELEM_KEY_END]);
6387 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6389 goto err_parse_key_end;
6393 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6395 goto err_parse_key_end;
6397 if (timeout != READ_ONCE(set->timeout)) {
6398 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6400 goto err_parse_key_end;
6405 for (i = 0; i < num_exprs; i++)
6406 size += expr_array[i]->ops->size;
6408 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6409 sizeof(struct nft_set_elem_expr) + size);
6411 goto err_parse_key_end;
6414 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
6415 obj = nft_obj_lookup(ctx->net, ctx->table,
6416 nla[NFTA_SET_ELEM_OBJREF],
6417 set->objtype, genmask);
6420 goto err_parse_key_end;
6422 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6424 goto err_parse_key_end;
6427 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
6428 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6429 nla[NFTA_SET_ELEM_DATA]);
6431 goto err_parse_key_end;
6433 dreg = nft_type_to_reg(set->dtype);
6434 list_for_each_entry(binding, &set->bindings, list) {
6435 struct nft_ctx bind_ctx = {
6437 .family = ctx->family,
6438 .table = ctx->table,
6439 .chain = (struct nft_chain *)binding->chain,
6442 if (!(binding->flags & NFT_SET_MAP))
6445 err = nft_validate_register_store(&bind_ctx, dreg,
6447 desc.type, desc.len);
6449 goto err_parse_data;
6451 if (desc.type == NFT_DATA_VERDICT &&
6452 (elem.data.val.verdict.code == NFT_GOTO ||
6453 elem.data.val.verdict.code == NFT_JUMP))
6454 nft_validate_state_update(ctx->table,
6458 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6460 goto err_parse_data;
6463 /* The full maximum length of userdata can exceed the maximum
6464 * offset value (U8_MAX) for following extensions, therefor it
6465 * must be the last extension added.
6468 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6469 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
6471 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6474 goto err_parse_data;
6478 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6479 elem.key_end.val.data, elem.data.val.data,
6480 timeout, expiration, GFP_KERNEL_ACCOUNT);
6481 if (IS_ERR(elem.priv)) {
6482 err = PTR_ERR(elem.priv);
6483 goto err_parse_data;
6486 ext = nft_set_elem_ext(set, elem.priv);
6488 *nft_set_ext_flags(ext) = flags;
6491 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6493 goto err_elem_userdata;
6495 udata = nft_set_ext_userdata(ext);
6496 udata->len = ulen - 1;
6497 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6500 *nft_set_ext_obj(ext) = obj;
6503 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
6507 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
6508 if (trans == NULL) {
6513 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
6515 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
6517 if (err == -EEXIST) {
6518 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6519 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6520 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
6521 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
6522 goto err_element_clash;
6523 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6524 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6525 memcmp(nft_set_ext_data(ext),
6526 nft_set_ext_data(ext2), set->dlen) != 0) ||
6527 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6528 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6529 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
6530 goto err_element_clash;
6531 else if (!(nlmsg_flags & NLM_F_EXCL))
6533 } else if (err == -ENOTEMPTY) {
6534 /* ENOTEMPTY reports overlapping between this element
6535 * and an existing one.
6539 goto err_element_clash;
6542 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
6543 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
6548 nft_trans_elem(trans) = elem;
6549 nft_trans_commit_list_add_tail(ctx->net, trans);
6553 nft_setelem_remove(ctx->net, set, &elem);
6560 nf_tables_set_elem_destroy(ctx, set, elem.priv);
6562 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6563 nft_data_release(&elem.data.val, desc.type);
6565 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6567 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
6569 for (i = 0; i < num_exprs && expr_array[i]; i++)
6570 nft_expr_destroy(ctx, expr_array[i]);
6571 err_set_elem_expr_clone:
6575 static int nf_tables_newsetelem(struct sk_buff *skb,
6576 const struct nfnl_info *info,
6577 const struct nlattr * const nla[])
6579 struct netlink_ext_ack *extack = info->extack;
6580 u8 genmask = nft_genmask_next(info->net);
6581 u8 family = info->nfmsg->nfgen_family;
6582 struct net *net = info->net;
6583 const struct nlattr *attr;
6584 struct nft_table *table;
6585 struct nft_set *set;
6589 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6592 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6593 genmask, NETLINK_CB(skb).portid);
6594 if (IS_ERR(table)) {
6595 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6596 return PTR_ERR(table);
6599 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
6600 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6602 return PTR_ERR(set);
6604 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6607 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6609 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6610 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
6612 NL_SET_BAD_ATTR(extack, attr);
6617 if (table->validate_state == NFT_VALIDATE_DO)
6618 return nft_table_validate(net, table);
6624 * nft_data_hold - hold a nft_data item
6626 * @data: struct nft_data to release
6627 * @type: type of data
6629 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6630 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6631 * NFT_GOTO verdicts. This function must be called on active data objects
6632 * from the second phase of the commit protocol.
6634 void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
6636 struct nft_chain *chain;
6637 struct nft_rule *rule;
6639 if (type == NFT_DATA_VERDICT) {
6640 switch (data->verdict.code) {
6643 chain = data->verdict.chain;
6646 if (!nft_chain_is_bound(chain))
6649 chain->table->use++;
6650 list_for_each_entry(rule, &chain->rules, list)
6653 nft_chain_add(chain->table, chain);
6659 static void nft_setelem_data_activate(const struct net *net,
6660 const struct nft_set *set,
6661 struct nft_set_elem *elem)
6663 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6665 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6666 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6667 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6668 (*nft_set_ext_obj(ext))->use++;
6671 static void nft_setelem_data_deactivate(const struct net *net,
6672 const struct nft_set *set,
6673 struct nft_set_elem *elem)
6675 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6677 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6678 nft_data_release(nft_set_ext_data(ext), set->dtype);
6679 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6680 (*nft_set_ext_obj(ext))->use--;
6683 static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
6684 const struct nlattr *attr)
6686 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
6687 struct nft_set_ext_tmpl tmpl;
6688 struct nft_set_elem elem;
6689 struct nft_set_ext *ext;
6690 struct nft_trans *trans;
6694 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6695 nft_set_elem_policy, NULL);
6699 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6703 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
6706 if (!nft_setelem_valid_key_end(set, nla, flags))
6709 nft_set_ext_prepare(&tmpl);
6712 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6717 if (nla[NFTA_SET_ELEM_KEY]) {
6718 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6719 nla[NFTA_SET_ELEM_KEY]);
6723 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6728 if (nla[NFTA_SET_ELEM_KEY_END]) {
6729 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6730 nla[NFTA_SET_ELEM_KEY_END]);
6734 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6736 goto fail_elem_key_end;
6740 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6741 elem.key_end.val.data, NULL, 0, 0,
6742 GFP_KERNEL_ACCOUNT);
6743 if (IS_ERR(elem.priv)) {
6744 err = PTR_ERR(elem.priv);
6745 goto fail_elem_key_end;
6748 ext = nft_set_elem_ext(set, elem.priv);
6750 *nft_set_ext_flags(ext) = flags;
6752 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
6756 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6760 nft_setelem_data_deactivate(ctx->net, set, &elem);
6762 nft_trans_elem(trans) = elem;
6763 nft_trans_commit_list_add_tail(ctx->net, trans);
6771 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6773 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
6777 static int nft_setelem_flush(const struct nft_ctx *ctx,
6778 struct nft_set *set,
6779 const struct nft_set_iter *iter,
6780 struct nft_set_elem *elem)
6782 struct nft_trans *trans;
6785 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6786 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6790 if (!set->ops->flush(ctx->net, set, elem->priv)) {
6796 nft_setelem_data_deactivate(ctx->net, set, elem);
6797 nft_trans_elem_set(trans) = set;
6798 nft_trans_elem(trans) = *elem;
6799 nft_trans_commit_list_add_tail(ctx->net, trans);
6807 static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6808 struct nft_set *set,
6809 struct nft_set_elem *elem)
6811 struct nft_trans *trans;
6813 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6814 sizeof(struct nft_trans_elem), GFP_KERNEL);
6818 nft_setelem_data_deactivate(ctx->net, set, elem);
6819 nft_trans_elem_set(trans) = set;
6820 nft_trans_elem(trans) = *elem;
6821 nft_trans_commit_list_add_tail(ctx->net, trans);
6826 static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6827 struct nft_set *set)
6829 u8 genmask = nft_genmask_next(ctx->net);
6830 struct nft_set_elem_catchall *catchall;
6831 struct nft_set_elem elem;
6832 struct nft_set_ext *ext;
6835 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6836 ext = nft_set_elem_ext(set, catchall->elem);
6837 if (!nft_set_elem_active(ext, genmask) ||
6838 nft_set_elem_mark_busy(ext))
6841 elem.priv = catchall->elem;
6842 ret = __nft_set_catchall_flush(ctx, set, &elem);
6850 static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
6852 struct nft_set_iter iter = {
6854 .fn = nft_setelem_flush,
6857 set->ops->walk(ctx, set, &iter);
6859 iter.err = nft_set_catchall_flush(ctx, set);
6864 static int nf_tables_delsetelem(struct sk_buff *skb,
6865 const struct nfnl_info *info,
6866 const struct nlattr * const nla[])
6868 struct netlink_ext_ack *extack = info->extack;
6869 u8 genmask = nft_genmask_next(info->net);
6870 u8 family = info->nfmsg->nfgen_family;
6871 struct net *net = info->net;
6872 const struct nlattr *attr;
6873 struct nft_table *table;
6874 struct nft_set *set;
6878 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6879 genmask, NETLINK_CB(skb).portid);
6880 if (IS_ERR(table)) {
6881 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6882 return PTR_ERR(table);
6885 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
6887 return PTR_ERR(set);
6888 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6891 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6893 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6894 return nft_set_flush(&ctx, set, genmask);
6896 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6897 err = nft_del_setelem(&ctx, set, attr);
6898 if (err == -ENOENT &&
6899 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
6903 NL_SET_BAD_ATTR(extack, attr);
6910 void nft_set_gc_batch_release(struct rcu_head *rcu)
6912 struct nft_set_gc_batch *gcb;
6915 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
6916 for (i = 0; i < gcb->head.cnt; i++)
6917 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
6921 struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
6924 struct nft_set_gc_batch *gcb;
6926 gcb = kzalloc(sizeof(*gcb), gfp);
6929 gcb->head.set = set;
6938 * nft_register_obj- register nf_tables stateful object type
6939 * @obj_type: object type
6941 * Registers the object type for use with nf_tables. Returns zero on
6942 * success or a negative errno code otherwise.
6944 int nft_register_obj(struct nft_object_type *obj_type)
6946 if (obj_type->type == NFT_OBJECT_UNSPEC)
6949 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6950 list_add_rcu(&obj_type->list, &nf_tables_objects);
6951 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6954 EXPORT_SYMBOL_GPL(nft_register_obj);
6957 * nft_unregister_obj - unregister nf_tables object type
6958 * @obj_type: object type
6960 * Unregisters the object type for use with nf_tables.
6962 void nft_unregister_obj(struct nft_object_type *obj_type)
6964 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6965 list_del_rcu(&obj_type->list);
6966 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6968 EXPORT_SYMBOL_GPL(nft_unregister_obj);
6970 struct nft_object *nft_obj_lookup(const struct net *net,
6971 const struct nft_table *table,
6972 const struct nlattr *nla, u32 objtype,
6975 struct nft_object_hash_key k = { .table = table };
6976 char search[NFT_OBJ_MAXNAMELEN];
6977 struct rhlist_head *tmp, *list;
6978 struct nft_object *obj;
6980 nla_strscpy(search, nla, sizeof(search));
6983 WARN_ON_ONCE(!rcu_read_lock_held() &&
6984 !lockdep_commit_lock_is_held(net));
6987 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
6991 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
6992 if (objtype == obj->ops->type->type &&
6993 nft_active_genmask(obj, genmask)) {
7000 return ERR_PTR(-ENOENT);
7002 EXPORT_SYMBOL_GPL(nft_obj_lookup);
7004 static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
7005 const struct nlattr *nla,
7006 u32 objtype, u8 genmask)
7008 struct nft_object *obj;
7010 list_for_each_entry(obj, &table->objects, list) {
7011 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
7012 objtype == obj->ops->type->type &&
7013 nft_active_genmask(obj, genmask))
7016 return ERR_PTR(-ENOENT);
7019 static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
7020 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
7021 .len = NFT_TABLE_MAXNAMELEN - 1 },
7022 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
7023 .len = NFT_OBJ_MAXNAMELEN - 1 },
7024 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
7025 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
7026 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
7027 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
7028 .len = NFT_USERDATA_MAXLEN },
7031 static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
7032 const struct nft_object_type *type,
7033 const struct nlattr *attr)
7036 const struct nft_object_ops *ops;
7037 struct nft_object *obj;
7040 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
7045 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
7046 type->policy, NULL);
7050 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
7053 if (type->select_ops) {
7054 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
7064 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
7068 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
7081 return ERR_PTR(err);
7084 static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
7085 struct nft_object *obj, bool reset)
7087 struct nlattr *nest;
7089 nest = nla_nest_start_noflag(skb, attr);
7091 goto nla_put_failure;
7092 if (obj->ops->dump(skb, obj, reset) < 0)
7093 goto nla_put_failure;
7094 nla_nest_end(skb, nest);
7101 static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
7103 const struct nft_object_type *type;
7105 list_for_each_entry(type, &nf_tables_objects, list) {
7106 if (objtype == type->type)
7112 static const struct nft_object_type *
7113 nft_obj_type_get(struct net *net, u32 objtype)
7115 const struct nft_object_type *type;
7117 type = __nft_obj_type_get(objtype);
7118 if (type != NULL && try_module_get(type->owner))
7121 lockdep_nfnl_nft_mutex_not_held();
7122 #ifdef CONFIG_MODULES
7124 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
7125 return ERR_PTR(-EAGAIN);
7128 return ERR_PTR(-ENOENT);
7131 static int nf_tables_updobj(const struct nft_ctx *ctx,
7132 const struct nft_object_type *type,
7133 const struct nlattr *attr,
7134 struct nft_object *obj)
7136 struct nft_object *newobj;
7137 struct nft_trans *trans;
7140 if (!try_module_get(type->owner))
7143 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
7144 sizeof(struct nft_trans_obj));
7148 newobj = nft_obj_init(ctx, type, attr);
7149 if (IS_ERR(newobj)) {
7150 err = PTR_ERR(newobj);
7151 goto err_free_trans;
7154 nft_trans_obj(trans) = obj;
7155 nft_trans_obj_update(trans) = true;
7156 nft_trans_obj_newobj(trans) = newobj;
7157 nft_trans_commit_list_add_tail(ctx->net, trans);
7164 module_put(type->owner);
7168 static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
7169 const struct nlattr * const nla[])
7171 struct netlink_ext_ack *extack = info->extack;
7172 u8 genmask = nft_genmask_next(info->net);
7173 u8 family = info->nfmsg->nfgen_family;
7174 const struct nft_object_type *type;
7175 struct net *net = info->net;
7176 struct nft_table *table;
7177 struct nft_object *obj;
7182 if (!nla[NFTA_OBJ_TYPE] ||
7183 !nla[NFTA_OBJ_NAME] ||
7184 !nla[NFTA_OBJ_DATA])
7187 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7188 NETLINK_CB(skb).portid);
7189 if (IS_ERR(table)) {
7190 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
7191 return PTR_ERR(table);
7194 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7195 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
7198 if (err != -ENOENT) {
7199 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
7203 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
7204 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
7207 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
7210 type = __nft_obj_type_get(objtype);
7211 if (WARN_ON_ONCE(!type))
7214 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7216 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
7219 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7221 type = nft_obj_type_get(net, objtype);
7223 return PTR_ERR(type);
7225 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
7230 obj->key.table = table;
7231 obj->handle = nf_tables_alloc_handle(table);
7233 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
7234 if (!obj->key.name) {
7239 if (nla[NFTA_OBJ_USERDATA]) {
7240 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
7241 if (obj->udata == NULL)
7244 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
7247 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
7251 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
7252 nft_objname_ht_params);
7256 list_add_tail_rcu(&obj->list, &table->objects);
7260 /* queued in transaction log */
7261 INIT_LIST_HEAD(&obj->list);
7266 kfree(obj->key.name);
7268 if (obj->ops->destroy)
7269 obj->ops->destroy(&ctx, obj);
7272 module_put(type->owner);
7276 static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
7277 u32 portid, u32 seq, int event, u32 flags,
7278 int family, const struct nft_table *table,
7279 struct nft_object *obj, bool reset)
7281 struct nlmsghdr *nlh;
7283 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
7284 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7285 NFNETLINK_V0, nft_base_seq(net));
7287 goto nla_put_failure;
7289 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
7290 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
7291 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7293 goto nla_put_failure;
7295 if (event == NFT_MSG_DELOBJ) {
7296 nlmsg_end(skb, nlh);
7300 if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
7301 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
7302 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
7303 goto nla_put_failure;
7306 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7307 goto nla_put_failure;
7309 nlmsg_end(skb, nlh);
7313 nlmsg_trim(skb, nlh);
7317 struct nft_obj_filter {
7322 static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7324 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
7325 const struct nft_table *table;
7326 unsigned int idx = 0, s_idx = cb->args[0];
7327 struct nft_obj_filter *filter = cb->data;
7328 struct net *net = sock_net(skb->sk);
7329 int family = nfmsg->nfgen_family;
7330 struct nftables_pernet *nft_net;
7331 struct nft_object *obj;
7334 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7338 nft_net = nft_pernet(net);
7339 cb->seq = READ_ONCE(nft_net->base_seq);
7341 list_for_each_entry_rcu(table, &nft_net->tables, list) {
7342 if (family != NFPROTO_UNSPEC && family != table->family)
7345 list_for_each_entry_rcu(obj, &table->objects, list) {
7346 if (!nft_is_active(net, obj))
7351 memset(&cb->args[1], 0,
7352 sizeof(cb->args) - sizeof(cb->args[0]));
7353 if (filter && filter->table &&
7354 strcmp(filter->table, table->name))
7357 filter->type != NFT_OBJECT_UNSPEC &&
7358 obj->ops->type->type != filter->type)
7361 char *buf = kasprintf(GFP_ATOMIC,
7366 audit_log_nfcfg(buf,
7369 AUDIT_NFT_OP_OBJ_RESET,
7374 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7377 NLM_F_MULTI | NLM_F_APPEND,
7378 table->family, table,
7382 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7394 static int nf_tables_dump_obj_start(struct netlink_callback *cb)
7396 const struct nlattr * const *nla = cb->data;
7397 struct nft_obj_filter *filter = NULL;
7399 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7400 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7404 if (nla[NFTA_OBJ_TABLE]) {
7405 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7406 if (!filter->table) {
7412 if (nla[NFTA_OBJ_TYPE])
7413 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7420 static int nf_tables_dump_obj_done(struct netlink_callback *cb)
7422 struct nft_obj_filter *filter = cb->data;
7425 kfree(filter->table);
7432 /* called with rcu_read_lock held */
7433 static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7434 const struct nlattr * const nla[])
7436 struct netlink_ext_ack *extack = info->extack;
7437 u8 genmask = nft_genmask_cur(info->net);
7438 u8 family = info->nfmsg->nfgen_family;
7439 const struct nft_table *table;
7440 struct net *net = info->net;
7441 struct nft_object *obj;
7442 struct sk_buff *skb2;
7447 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
7448 struct netlink_dump_control c = {
7449 .start = nf_tables_dump_obj_start,
7450 .dump = nf_tables_dump_obj,
7451 .done = nf_tables_dump_obj_done,
7452 .module = THIS_MODULE,
7453 .data = (void *)nla,
7456 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
7459 if (!nla[NFTA_OBJ_NAME] ||
7460 !nla[NFTA_OBJ_TYPE])
7463 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
7464 if (IS_ERR(table)) {
7465 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
7466 return PTR_ERR(table);
7469 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7470 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
7472 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
7473 return PTR_ERR(obj);
7476 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
7480 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7484 const struct nftables_pernet *nft_net;
7487 nft_net = nft_pernet(net);
7488 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
7490 audit_log_nfcfg(buf,
7493 AUDIT_NFT_OP_OBJ_RESET,
7498 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
7499 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
7500 family, table, obj, reset);
7502 goto err_fill_obj_info;
7504 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7511 static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
7513 if (obj->ops->destroy)
7514 obj->ops->destroy(ctx, obj);
7516 module_put(obj->ops->type->owner);
7517 kfree(obj->key.name);
7522 static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7523 const struct nlattr * const nla[])
7525 struct netlink_ext_ack *extack = info->extack;
7526 u8 genmask = nft_genmask_next(info->net);
7527 u8 family = info->nfmsg->nfgen_family;
7528 struct net *net = info->net;
7529 const struct nlattr *attr;
7530 struct nft_table *table;
7531 struct nft_object *obj;
7535 if (!nla[NFTA_OBJ_TYPE] ||
7536 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
7539 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7540 NETLINK_CB(skb).portid);
7541 if (IS_ERR(table)) {
7542 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
7543 return PTR_ERR(table);
7546 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7547 if (nla[NFTA_OBJ_HANDLE]) {
7548 attr = nla[NFTA_OBJ_HANDLE];
7549 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7551 attr = nla[NFTA_OBJ_NAME];
7552 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
7556 if (PTR_ERR(obj) == -ENOENT &&
7557 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
7560 NL_SET_BAD_ATTR(extack, attr);
7561 return PTR_ERR(obj);
7564 NL_SET_BAD_ATTR(extack, attr);
7568 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7570 return nft_delobj(&ctx, obj);
7573 void nft_obj_notify(struct net *net, const struct nft_table *table,
7574 struct nft_object *obj, u32 portid, u32 seq, int event,
7575 u16 flags, int family, int report, gfp_t gfp)
7577 struct nftables_pernet *nft_net = nft_pernet(net);
7578 struct sk_buff *skb;
7580 char *buf = kasprintf(gfp, "%s:%u",
7581 table->name, nft_net->base_seq);
7583 audit_log_nfcfg(buf,
7586 event == NFT_MSG_NEWOBJ ?
7587 AUDIT_NFT_OP_OBJ_REGISTER :
7588 AUDIT_NFT_OP_OBJ_UNREGISTER,
7593 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
7596 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
7600 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7601 flags & (NLM_F_CREATE | NLM_F_EXCL),
7602 family, table, obj, false);
7608 nft_notify_enqueue(skb, report, &nft_net->notify_list);
7611 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
7613 EXPORT_SYMBOL_GPL(nft_obj_notify);
7615 static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7616 struct nft_object *obj, int event)
7618 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
7619 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
7625 void nft_register_flowtable_type(struct nf_flowtable_type *type)
7627 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7628 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7629 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7631 EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7633 void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7635 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7636 list_del_rcu(&type->list);
7637 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7639 EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7641 static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7642 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7643 .len = NFT_NAME_MAXLEN - 1 },
7644 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7645 .len = NFT_NAME_MAXLEN - 1 },
7646 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
7647 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
7648 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
7651 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7652 const struct nlattr *nla, u8 genmask)
7654 struct nft_flowtable *flowtable;
7656 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
7657 if (!nla_strcmp(nla, flowtable->name) &&
7658 nft_active_genmask(flowtable, genmask))
7661 return ERR_PTR(-ENOENT);
7663 EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
7665 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7666 struct nft_flowtable *flowtable,
7667 enum nft_trans_phase phase)
7670 case NFT_TRANS_PREPARE:
7671 case NFT_TRANS_ABORT:
7672 case NFT_TRANS_RELEASE:
7679 EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7681 static struct nft_flowtable *
7682 nft_flowtable_lookup_byhandle(const struct nft_table *table,
7683 const struct nlattr *nla, u8 genmask)
7685 struct nft_flowtable *flowtable;
7687 list_for_each_entry(flowtable, &table->flowtables, list) {
7688 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7689 nft_active_genmask(flowtable, genmask))
7692 return ERR_PTR(-ENOENT);
7695 struct nft_flowtable_hook {
7698 struct list_head list;
7701 static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7702 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7703 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7704 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7707 static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
7708 const struct nlattr * const nla[],
7709 struct nft_flowtable_hook *flowtable_hook,
7710 struct nft_flowtable *flowtable,
7711 struct netlink_ext_ack *extack, bool add)
7713 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
7714 struct nft_hook *hook;
7715 int hooknum, priority;
7718 INIT_LIST_HEAD(&flowtable_hook->list);
7720 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX,
7721 nla[NFTA_FLOWTABLE_HOOK],
7722 nft_flowtable_hook_policy, NULL);
7727 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
7728 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7729 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
7733 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7734 if (hooknum != NF_NETDEV_INGRESS)
7737 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7739 flowtable_hook->priority = priority;
7740 flowtable_hook->num = hooknum;
7742 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7743 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7744 if (hooknum != flowtable->hooknum)
7748 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7749 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7750 if (priority != flowtable->data.priority)
7754 flowtable_hook->priority = flowtable->data.priority;
7755 flowtable_hook->num = flowtable->hooknum;
7758 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7759 err = nf_tables_parse_netdev_hooks(ctx->net,
7760 tb[NFTA_FLOWTABLE_HOOK_DEVS],
7761 &flowtable_hook->list,
7767 list_for_each_entry(hook, &flowtable_hook->list, list) {
7768 hook->ops.pf = NFPROTO_NETDEV;
7769 hook->ops.hooknum = flowtable_hook->num;
7770 hook->ops.priority = flowtable_hook->priority;
7771 hook->ops.priv = &flowtable->data;
7772 hook->ops.hook = flowtable->data.type->hook;
7778 static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
7780 const struct nf_flowtable_type *type;
7782 list_for_each_entry(type, &nf_tables_flowtables, list) {
7783 if (family == type->family)
7789 static const struct nf_flowtable_type *
7790 nft_flowtable_type_get(struct net *net, u8 family)
7792 const struct nf_flowtable_type *type;
7794 type = __nft_flowtable_type_get(family);
7795 if (type != NULL && try_module_get(type->owner))
7798 lockdep_nfnl_nft_mutex_not_held();
7799 #ifdef CONFIG_MODULES
7801 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
7802 return ERR_PTR(-EAGAIN);
7805 return ERR_PTR(-ENOENT);
7808 /* Only called from error and netdev event paths. */
7809 static void nft_unregister_flowtable_hook(struct net *net,
7810 struct nft_flowtable *flowtable,
7811 struct nft_hook *hook)
7813 nf_unregister_net_hook(net, &hook->ops);
7814 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7818 static void __nft_unregister_flowtable_net_hooks(struct net *net,
7819 struct list_head *hook_list,
7820 bool release_netdev)
7822 struct nft_hook *hook, *next;
7824 list_for_each_entry_safe(hook, next, hook_list, list) {
7825 nf_unregister_net_hook(net, &hook->ops);
7826 if (release_netdev) {
7827 list_del(&hook->list);
7828 kfree_rcu(hook, rcu);
7833 static void nft_unregister_flowtable_net_hooks(struct net *net,
7834 struct list_head *hook_list)
7836 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
7839 static int nft_register_flowtable_net_hooks(struct net *net,
7840 struct nft_table *table,
7841 struct list_head *hook_list,
7842 struct nft_flowtable *flowtable)
7844 struct nft_hook *hook, *hook2, *next;
7845 struct nft_flowtable *ft;
7848 list_for_each_entry(hook, hook_list, list) {
7849 list_for_each_entry(ft, &table->flowtables, list) {
7850 if (!nft_is_active_next(net, ft))
7853 list_for_each_entry(hook2, &ft->hook_list, list) {
7854 if (hook->ops.dev == hook2->ops.dev &&
7855 hook->ops.pf == hook2->ops.pf) {
7857 goto err_unregister_net_hooks;
7862 err = flowtable->data.type->setup(&flowtable->data,
7866 goto err_unregister_net_hooks;
7868 err = nf_register_net_hook(net, &hook->ops);
7870 flowtable->data.type->setup(&flowtable->data,
7873 goto err_unregister_net_hooks;
7881 err_unregister_net_hooks:
7882 list_for_each_entry_safe(hook, next, hook_list, list) {
7886 nft_unregister_flowtable_hook(net, flowtable, hook);
7887 list_del_rcu(&hook->list);
7888 kfree_rcu(hook, rcu);
7894 static void nft_hooks_destroy(struct list_head *hook_list)
7896 struct nft_hook *hook, *next;
7898 list_for_each_entry_safe(hook, next, hook_list, list) {
7899 list_del_rcu(&hook->list);
7900 kfree_rcu(hook, rcu);
7904 static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
7905 struct nft_flowtable *flowtable,
7906 struct netlink_ext_ack *extack)
7908 const struct nlattr * const *nla = ctx->nla;
7909 struct nft_flowtable_hook flowtable_hook;
7910 struct nft_hook *hook, *next;
7911 struct nft_trans *trans;
7912 bool unregister = false;
7916 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
7921 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7922 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
7923 list_del(&hook->list);
7928 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7929 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7930 if (flags & ~NFT_FLOWTABLE_MASK) {
7932 goto err_flowtable_update_hook;
7934 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
7935 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
7937 goto err_flowtable_update_hook;
7940 flags = flowtable->data.flags;
7943 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
7944 &flowtable_hook.list, flowtable);
7946 goto err_flowtable_update_hook;
7948 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
7949 sizeof(struct nft_trans_flowtable));
7953 goto err_flowtable_update_hook;
7956 nft_trans_flowtable_flags(trans) = flags;
7957 nft_trans_flowtable(trans) = flowtable;
7958 nft_trans_flowtable_update(trans) = true;
7959 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7960 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
7962 nft_trans_commit_list_add_tail(ctx->net, trans);
7966 err_flowtable_update_hook:
7967 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7969 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
7970 list_del_rcu(&hook->list);
7971 kfree_rcu(hook, rcu);
7978 static int nf_tables_newflowtable(struct sk_buff *skb,
7979 const struct nfnl_info *info,
7980 const struct nlattr * const nla[])
7982 struct netlink_ext_ack *extack = info->extack;
7983 struct nft_flowtable_hook flowtable_hook;
7984 u8 genmask = nft_genmask_next(info->net);
7985 u8 family = info->nfmsg->nfgen_family;
7986 const struct nf_flowtable_type *type;
7987 struct nft_flowtable *flowtable;
7988 struct nft_hook *hook, *next;
7989 struct net *net = info->net;
7990 struct nft_table *table;
7994 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7995 !nla[NFTA_FLOWTABLE_NAME] ||
7996 !nla[NFTA_FLOWTABLE_HOOK])
7999 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
8000 genmask, NETLINK_CB(skb).portid);
8001 if (IS_ERR(table)) {
8002 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
8003 return PTR_ERR(table);
8006 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8008 if (IS_ERR(flowtable)) {
8009 err = PTR_ERR(flowtable);
8010 if (err != -ENOENT) {
8011 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8015 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
8016 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8020 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
8022 return nft_flowtable_update(&ctx, info->nlh, flowtable, extack);
8025 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
8027 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
8031 flowtable->table = table;
8032 flowtable->handle = nf_tables_alloc_handle(table);
8033 INIT_LIST_HEAD(&flowtable->hook_list);
8035 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
8036 if (!flowtable->name) {
8041 type = nft_flowtable_type_get(net, family);
8043 err = PTR_ERR(type);
8047 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8048 flowtable->data.flags =
8049 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
8050 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
8056 write_pnet(&flowtable->data.net, net);
8057 flowtable->data.type = type;
8058 err = type->init(&flowtable->data);
8062 err = nft_flowtable_parse_hook(&ctx, nla, &flowtable_hook, flowtable,
8067 list_splice(&flowtable_hook.list, &flowtable->hook_list);
8068 flowtable->data.priority = flowtable_hook.priority;
8069 flowtable->hooknum = flowtable_hook.num;
8071 err = nft_register_flowtable_net_hooks(ctx.net, table,
8072 &flowtable->hook_list,
8075 nft_hooks_destroy(&flowtable->hook_list);
8079 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
8083 list_add_tail_rcu(&flowtable->list, &table->flowtables);
8088 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
8089 nft_unregister_flowtable_hook(net, flowtable, hook);
8090 list_del_rcu(&hook->list);
8091 kfree_rcu(hook, rcu);
8094 flowtable->data.type->free(&flowtable->data);
8096 module_put(type->owner);
8098 kfree(flowtable->name);
8104 static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
8106 struct nft_hook *this, *next;
8108 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
8109 list_del(&this->list);
8114 static int nft_delflowtable_hook(struct nft_ctx *ctx,
8115 struct nft_flowtable *flowtable,
8116 struct netlink_ext_ack *extack)
8118 const struct nlattr * const *nla = ctx->nla;
8119 struct nft_flowtable_hook flowtable_hook;
8120 LIST_HEAD(flowtable_del_list);
8121 struct nft_hook *this, *hook;
8122 struct nft_trans *trans;
8125 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8130 list_for_each_entry(this, &flowtable_hook.list, list) {
8131 hook = nft_hook_list_find(&flowtable->hook_list, this);
8134 goto err_flowtable_del_hook;
8136 list_move(&hook->list, &flowtable_del_list);
8139 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
8140 sizeof(struct nft_trans_flowtable));
8143 goto err_flowtable_del_hook;
8146 nft_trans_flowtable(trans) = flowtable;
8147 nft_trans_flowtable_update(trans) = true;
8148 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
8149 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
8150 nft_flowtable_hook_release(&flowtable_hook);
8152 nft_trans_commit_list_add_tail(ctx->net, trans);
8156 err_flowtable_del_hook:
8157 list_splice(&flowtable_del_list, &flowtable->hook_list);
8158 nft_flowtable_hook_release(&flowtable_hook);
8163 static int nf_tables_delflowtable(struct sk_buff *skb,
8164 const struct nfnl_info *info,
8165 const struct nlattr * const nla[])
8167 struct netlink_ext_ack *extack = info->extack;
8168 u8 genmask = nft_genmask_next(info->net);
8169 u8 family = info->nfmsg->nfgen_family;
8170 struct nft_flowtable *flowtable;
8171 struct net *net = info->net;
8172 const struct nlattr *attr;
8173 struct nft_table *table;
8176 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8177 (!nla[NFTA_FLOWTABLE_NAME] &&
8178 !nla[NFTA_FLOWTABLE_HANDLE]))
8181 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
8182 genmask, NETLINK_CB(skb).portid);
8183 if (IS_ERR(table)) {
8184 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
8185 return PTR_ERR(table);
8188 if (nla[NFTA_FLOWTABLE_HANDLE]) {
8189 attr = nla[NFTA_FLOWTABLE_HANDLE];
8190 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
8192 attr = nla[NFTA_FLOWTABLE_NAME];
8193 flowtable = nft_flowtable_lookup(table, attr, genmask);
8196 if (IS_ERR(flowtable)) {
8197 if (PTR_ERR(flowtable) == -ENOENT &&
8198 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
8201 NL_SET_BAD_ATTR(extack, attr);
8202 return PTR_ERR(flowtable);
8205 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
8207 if (nla[NFTA_FLOWTABLE_HOOK])
8208 return nft_delflowtable_hook(&ctx, flowtable, extack);
8210 if (flowtable->use > 0) {
8211 NL_SET_BAD_ATTR(extack, attr);
8215 return nft_delflowtable(&ctx, flowtable);
8218 static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
8219 u32 portid, u32 seq, int event,
8220 u32 flags, int family,
8221 struct nft_flowtable *flowtable,
8222 struct list_head *hook_list)
8224 struct nlattr *nest, *nest_devs;
8225 struct nft_hook *hook;
8226 struct nlmsghdr *nlh;
8228 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
8229 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
8230 NFNETLINK_V0, nft_base_seq(net));
8232 goto nla_put_failure;
8234 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
8235 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
8236 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
8237 NFTA_FLOWTABLE_PAD))
8238 goto nla_put_failure;
8240 if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
8241 nlmsg_end(skb, nlh);
8245 if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
8246 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
8247 goto nla_put_failure;
8249 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
8251 goto nla_put_failure;
8252 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
8253 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
8254 goto nla_put_failure;
8256 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
8258 goto nla_put_failure;
8261 hook_list = &flowtable->hook_list;
8263 list_for_each_entry_rcu(hook, hook_list, list) {
8264 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
8265 goto nla_put_failure;
8267 nla_nest_end(skb, nest_devs);
8268 nla_nest_end(skb, nest);
8270 nlmsg_end(skb, nlh);
8274 nlmsg_trim(skb, nlh);
8278 struct nft_flowtable_filter {
8282 static int nf_tables_dump_flowtable(struct sk_buff *skb,
8283 struct netlink_callback *cb)
8285 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
8286 struct nft_flowtable_filter *filter = cb->data;
8287 unsigned int idx = 0, s_idx = cb->args[0];
8288 struct net *net = sock_net(skb->sk);
8289 int family = nfmsg->nfgen_family;
8290 struct nft_flowtable *flowtable;
8291 struct nftables_pernet *nft_net;
8292 const struct nft_table *table;
8295 nft_net = nft_pernet(net);
8296 cb->seq = READ_ONCE(nft_net->base_seq);
8298 list_for_each_entry_rcu(table, &nft_net->tables, list) {
8299 if (family != NFPROTO_UNSPEC && family != table->family)
8302 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8303 if (!nft_is_active(net, flowtable))
8308 memset(&cb->args[1], 0,
8309 sizeof(cb->args) - sizeof(cb->args[0]));
8310 if (filter && filter->table &&
8311 strcmp(filter->table, table->name))
8314 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
8316 NFT_MSG_NEWFLOWTABLE,
8317 NLM_F_MULTI | NLM_F_APPEND,
8319 flowtable, NULL) < 0)
8322 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
8334 static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
8336 const struct nlattr * const *nla = cb->data;
8337 struct nft_flowtable_filter *filter = NULL;
8339 if (nla[NFTA_FLOWTABLE_TABLE]) {
8340 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8344 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8346 if (!filter->table) {
8356 static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
8358 struct nft_flowtable_filter *filter = cb->data;
8363 kfree(filter->table);
8369 /* called with rcu_read_lock held */
8370 static int nf_tables_getflowtable(struct sk_buff *skb,
8371 const struct nfnl_info *info,
8372 const struct nlattr * const nla[])
8374 u8 genmask = nft_genmask_cur(info->net);
8375 u8 family = info->nfmsg->nfgen_family;
8376 struct nft_flowtable *flowtable;
8377 const struct nft_table *table;
8378 struct net *net = info->net;
8379 struct sk_buff *skb2;
8382 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
8383 struct netlink_dump_control c = {
8384 .start = nf_tables_dump_flowtable_start,
8385 .dump = nf_tables_dump_flowtable,
8386 .done = nf_tables_dump_flowtable_done,
8387 .module = THIS_MODULE,
8388 .data = (void *)nla,
8391 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
8394 if (!nla[NFTA_FLOWTABLE_NAME])
8397 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
8400 return PTR_ERR(table);
8402 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8404 if (IS_ERR(flowtable))
8405 return PTR_ERR(flowtable);
8407 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
8411 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
8412 info->nlh->nlmsg_seq,
8413 NFT_MSG_NEWFLOWTABLE, 0, family,
8416 goto err_fill_flowtable_info;
8418 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8420 err_fill_flowtable_info:
8425 static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8426 struct nft_flowtable *flowtable,
8427 struct list_head *hook_list, int event)
8429 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
8430 struct sk_buff *skb;
8435 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8438 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8442 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8443 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8445 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
8446 ctx->seq, event, flags,
8447 ctx->family, flowtable, hook_list);
8453 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
8456 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8459 static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8461 struct nft_hook *hook, *next;
8463 flowtable->data.type->free(&flowtable->data);
8464 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
8465 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8467 list_del_rcu(&hook->list);
8470 kfree(flowtable->name);
8471 module_put(flowtable->data.type->owner);
8475 static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8476 u32 portid, u32 seq)
8478 struct nftables_pernet *nft_net = nft_pernet(net);
8479 struct nlmsghdr *nlh;
8480 char buf[TASK_COMM_LEN];
8481 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
8483 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8484 NFNETLINK_V0, nft_base_seq(net));
8486 goto nla_put_failure;
8488 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
8489 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8490 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
8491 goto nla_put_failure;
8493 nlmsg_end(skb, nlh);
8497 nlmsg_trim(skb, nlh);
8501 static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8502 struct nft_flowtable *flowtable)
8504 struct nft_hook *hook;
8506 list_for_each_entry(hook, &flowtable->hook_list, list) {
8507 if (hook->ops.dev != dev)
8510 /* flow_offload_netdev_event() cleans up entries for us. */
8511 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
8512 list_del_rcu(&hook->list);
8513 kfree_rcu(hook, rcu);
8518 static int nf_tables_flowtable_event(struct notifier_block *this,
8519 unsigned long event, void *ptr)
8521 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8522 struct nft_flowtable *flowtable;
8523 struct nftables_pernet *nft_net;
8524 struct nft_table *table;
8527 if (event != NETDEV_UNREGISTER)
8531 nft_net = nft_pernet(net);
8532 mutex_lock(&nft_net->commit_mutex);
8533 list_for_each_entry(table, &nft_net->tables, list) {
8534 list_for_each_entry(flowtable, &table->flowtables, list) {
8535 nft_flowtable_event(event, dev, flowtable);
8538 mutex_unlock(&nft_net->commit_mutex);
8543 static struct notifier_block nf_tables_flowtable_notifier = {
8544 .notifier_call = nf_tables_flowtable_event,
8547 static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8550 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8551 struct sk_buff *skb2;
8554 if (!nlmsg_report(nlh) &&
8555 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
8558 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8562 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8569 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8570 nlmsg_report(nlh), GFP_KERNEL);
8573 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8577 static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8578 const struct nlattr * const nla[])
8580 struct sk_buff *skb2;
8583 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
8587 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8588 info->nlh->nlmsg_seq);
8590 goto err_fill_gen_info;
8592 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
8599 static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8600 [NFT_MSG_NEWTABLE] = {
8601 .call = nf_tables_newtable,
8602 .type = NFNL_CB_BATCH,
8603 .attr_count = NFTA_TABLE_MAX,
8604 .policy = nft_table_policy,
8606 [NFT_MSG_GETTABLE] = {
8607 .call = nf_tables_gettable,
8608 .type = NFNL_CB_RCU,
8609 .attr_count = NFTA_TABLE_MAX,
8610 .policy = nft_table_policy,
8612 [NFT_MSG_DELTABLE] = {
8613 .call = nf_tables_deltable,
8614 .type = NFNL_CB_BATCH,
8615 .attr_count = NFTA_TABLE_MAX,
8616 .policy = nft_table_policy,
8618 [NFT_MSG_DESTROYTABLE] = {
8619 .call = nf_tables_deltable,
8620 .type = NFNL_CB_BATCH,
8621 .attr_count = NFTA_TABLE_MAX,
8622 .policy = nft_table_policy,
8624 [NFT_MSG_NEWCHAIN] = {
8625 .call = nf_tables_newchain,
8626 .type = NFNL_CB_BATCH,
8627 .attr_count = NFTA_CHAIN_MAX,
8628 .policy = nft_chain_policy,
8630 [NFT_MSG_GETCHAIN] = {
8631 .call = nf_tables_getchain,
8632 .type = NFNL_CB_RCU,
8633 .attr_count = NFTA_CHAIN_MAX,
8634 .policy = nft_chain_policy,
8636 [NFT_MSG_DELCHAIN] = {
8637 .call = nf_tables_delchain,
8638 .type = NFNL_CB_BATCH,
8639 .attr_count = NFTA_CHAIN_MAX,
8640 .policy = nft_chain_policy,
8642 [NFT_MSG_DESTROYCHAIN] = {
8643 .call = nf_tables_delchain,
8644 .type = NFNL_CB_BATCH,
8645 .attr_count = NFTA_CHAIN_MAX,
8646 .policy = nft_chain_policy,
8648 [NFT_MSG_NEWRULE] = {
8649 .call = nf_tables_newrule,
8650 .type = NFNL_CB_BATCH,
8651 .attr_count = NFTA_RULE_MAX,
8652 .policy = nft_rule_policy,
8654 [NFT_MSG_GETRULE] = {
8655 .call = nf_tables_getrule,
8656 .type = NFNL_CB_RCU,
8657 .attr_count = NFTA_RULE_MAX,
8658 .policy = nft_rule_policy,
8660 [NFT_MSG_GETRULE_RESET] = {
8661 .call = nf_tables_getrule,
8662 .type = NFNL_CB_RCU,
8663 .attr_count = NFTA_RULE_MAX,
8664 .policy = nft_rule_policy,
8666 [NFT_MSG_DELRULE] = {
8667 .call = nf_tables_delrule,
8668 .type = NFNL_CB_BATCH,
8669 .attr_count = NFTA_RULE_MAX,
8670 .policy = nft_rule_policy,
8672 [NFT_MSG_DESTROYRULE] = {
8673 .call = nf_tables_delrule,
8674 .type = NFNL_CB_BATCH,
8675 .attr_count = NFTA_RULE_MAX,
8676 .policy = nft_rule_policy,
8678 [NFT_MSG_NEWSET] = {
8679 .call = nf_tables_newset,
8680 .type = NFNL_CB_BATCH,
8681 .attr_count = NFTA_SET_MAX,
8682 .policy = nft_set_policy,
8684 [NFT_MSG_GETSET] = {
8685 .call = nf_tables_getset,
8686 .type = NFNL_CB_RCU,
8687 .attr_count = NFTA_SET_MAX,
8688 .policy = nft_set_policy,
8690 [NFT_MSG_DELSET] = {
8691 .call = nf_tables_delset,
8692 .type = NFNL_CB_BATCH,
8693 .attr_count = NFTA_SET_MAX,
8694 .policy = nft_set_policy,
8696 [NFT_MSG_DESTROYSET] = {
8697 .call = nf_tables_delset,
8698 .type = NFNL_CB_BATCH,
8699 .attr_count = NFTA_SET_MAX,
8700 .policy = nft_set_policy,
8702 [NFT_MSG_NEWSETELEM] = {
8703 .call = nf_tables_newsetelem,
8704 .type = NFNL_CB_BATCH,
8705 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8706 .policy = nft_set_elem_list_policy,
8708 [NFT_MSG_GETSETELEM] = {
8709 .call = nf_tables_getsetelem,
8710 .type = NFNL_CB_RCU,
8711 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8712 .policy = nft_set_elem_list_policy,
8714 [NFT_MSG_DELSETELEM] = {
8715 .call = nf_tables_delsetelem,
8716 .type = NFNL_CB_BATCH,
8717 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8718 .policy = nft_set_elem_list_policy,
8720 [NFT_MSG_DESTROYSETELEM] = {
8721 .call = nf_tables_delsetelem,
8722 .type = NFNL_CB_BATCH,
8723 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8724 .policy = nft_set_elem_list_policy,
8726 [NFT_MSG_GETGEN] = {
8727 .call = nf_tables_getgen,
8728 .type = NFNL_CB_RCU,
8730 [NFT_MSG_NEWOBJ] = {
8731 .call = nf_tables_newobj,
8732 .type = NFNL_CB_BATCH,
8733 .attr_count = NFTA_OBJ_MAX,
8734 .policy = nft_obj_policy,
8736 [NFT_MSG_GETOBJ] = {
8737 .call = nf_tables_getobj,
8738 .type = NFNL_CB_RCU,
8739 .attr_count = NFTA_OBJ_MAX,
8740 .policy = nft_obj_policy,
8742 [NFT_MSG_DELOBJ] = {
8743 .call = nf_tables_delobj,
8744 .type = NFNL_CB_BATCH,
8745 .attr_count = NFTA_OBJ_MAX,
8746 .policy = nft_obj_policy,
8748 [NFT_MSG_DESTROYOBJ] = {
8749 .call = nf_tables_delobj,
8750 .type = NFNL_CB_BATCH,
8751 .attr_count = NFTA_OBJ_MAX,
8752 .policy = nft_obj_policy,
8754 [NFT_MSG_GETOBJ_RESET] = {
8755 .call = nf_tables_getobj,
8756 .type = NFNL_CB_RCU,
8757 .attr_count = NFTA_OBJ_MAX,
8758 .policy = nft_obj_policy,
8760 [NFT_MSG_NEWFLOWTABLE] = {
8761 .call = nf_tables_newflowtable,
8762 .type = NFNL_CB_BATCH,
8763 .attr_count = NFTA_FLOWTABLE_MAX,
8764 .policy = nft_flowtable_policy,
8766 [NFT_MSG_GETFLOWTABLE] = {
8767 .call = nf_tables_getflowtable,
8768 .type = NFNL_CB_RCU,
8769 .attr_count = NFTA_FLOWTABLE_MAX,
8770 .policy = nft_flowtable_policy,
8772 [NFT_MSG_DELFLOWTABLE] = {
8773 .call = nf_tables_delflowtable,
8774 .type = NFNL_CB_BATCH,
8775 .attr_count = NFTA_FLOWTABLE_MAX,
8776 .policy = nft_flowtable_policy,
8778 [NFT_MSG_DESTROYFLOWTABLE] = {
8779 .call = nf_tables_delflowtable,
8780 .type = NFNL_CB_BATCH,
8781 .attr_count = NFTA_FLOWTABLE_MAX,
8782 .policy = nft_flowtable_policy,
8786 static int nf_tables_validate(struct net *net)
8788 struct nftables_pernet *nft_net = nft_pernet(net);
8789 struct nft_table *table;
8791 list_for_each_entry(table, &nft_net->tables, list) {
8792 switch (table->validate_state) {
8793 case NFT_VALIDATE_SKIP:
8795 case NFT_VALIDATE_NEED:
8796 nft_validate_state_update(table, NFT_VALIDATE_DO);
8798 case NFT_VALIDATE_DO:
8799 if (nft_table_validate(net, table) < 0)
8802 nft_validate_state_update(table, NFT_VALIDATE_SKIP);
8811 /* a drop policy has to be deferred until all rules have been activated,
8812 * otherwise a large ruleset that contains a drop-policy base chain will
8813 * cause all packets to get dropped until the full transaction has been
8816 * We defer the drop policy until the transaction has been finalized.
8818 static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8820 struct nft_base_chain *basechain;
8822 if (nft_trans_chain_policy(trans) != NF_DROP)
8825 if (!nft_is_base_chain(trans->ctx.chain))
8828 basechain = nft_base_chain(trans->ctx.chain);
8829 basechain->policy = NF_DROP;
8832 static void nft_chain_commit_update(struct nft_trans *trans)
8834 struct nft_base_chain *basechain;
8836 if (nft_trans_chain_name(trans)) {
8837 rhltable_remove(&trans->ctx.table->chains_ht,
8838 &trans->ctx.chain->rhlhead,
8839 nft_chain_ht_params);
8840 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
8841 rhltable_insert_key(&trans->ctx.table->chains_ht,
8842 trans->ctx.chain->name,
8843 &trans->ctx.chain->rhlhead,
8844 nft_chain_ht_params);
8847 if (!nft_is_base_chain(trans->ctx.chain))
8850 nft_chain_stats_replace(trans);
8852 basechain = nft_base_chain(trans->ctx.chain);
8854 switch (nft_trans_chain_policy(trans)) {
8857 basechain->policy = nft_trans_chain_policy(trans);
8862 static void nft_obj_commit_update(struct nft_trans *trans)
8864 struct nft_object *newobj;
8865 struct nft_object *obj;
8867 obj = nft_trans_obj(trans);
8868 newobj = nft_trans_obj_newobj(trans);
8870 if (obj->ops->update)
8871 obj->ops->update(obj, newobj);
8873 nft_obj_destroy(&trans->ctx, newobj);
8876 static void nft_commit_release(struct nft_trans *trans)
8878 switch (trans->msg_type) {
8879 case NFT_MSG_DELTABLE:
8880 case NFT_MSG_DESTROYTABLE:
8881 nf_tables_table_destroy(&trans->ctx);
8883 case NFT_MSG_NEWCHAIN:
8884 free_percpu(nft_trans_chain_stats(trans));
8885 kfree(nft_trans_chain_name(trans));
8887 case NFT_MSG_DELCHAIN:
8888 case NFT_MSG_DESTROYCHAIN:
8889 if (nft_trans_chain_update(trans))
8890 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
8892 nf_tables_chain_destroy(&trans->ctx);
8894 case NFT_MSG_DELRULE:
8895 case NFT_MSG_DESTROYRULE:
8896 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8898 case NFT_MSG_DELSET:
8899 case NFT_MSG_DESTROYSET:
8900 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
8902 case NFT_MSG_DELSETELEM:
8903 case NFT_MSG_DESTROYSETELEM:
8904 nf_tables_set_elem_destroy(&trans->ctx,
8905 nft_trans_elem_set(trans),
8906 nft_trans_elem(trans).priv);
8908 case NFT_MSG_DELOBJ:
8909 case NFT_MSG_DESTROYOBJ:
8910 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
8912 case NFT_MSG_DELFLOWTABLE:
8913 case NFT_MSG_DESTROYFLOWTABLE:
8914 if (nft_trans_flowtable_update(trans))
8915 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
8917 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
8922 put_net(trans->ctx.net);
8927 static void nf_tables_trans_destroy_work(struct work_struct *w)
8929 struct nft_trans *trans, *next;
8932 spin_lock(&nf_tables_destroy_list_lock);
8933 list_splice_init(&nf_tables_destroy_list, &head);
8934 spin_unlock(&nf_tables_destroy_list_lock);
8936 if (list_empty(&head))
8941 list_for_each_entry_safe(trans, next, &head, list) {
8942 list_del(&trans->list);
8943 nft_commit_release(trans);
8947 void nf_tables_trans_destroy_flush_work(void)
8949 flush_work(&trans_destroy_work);
8951 EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
8953 static bool nft_expr_reduce(struct nft_regs_track *track,
8954 const struct nft_expr *expr)
8959 static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
8961 const struct nft_expr *expr, *last;
8962 struct nft_regs_track track = {};
8963 unsigned int size, data_size;
8964 void *data, *data_boundary;
8965 struct nft_rule_dp *prule;
8966 struct nft_rule *rule;
8968 /* already handled or inactive chain? */
8969 if (chain->blob_next || !nft_is_active_next(net, chain))
8973 list_for_each_entry(rule, &chain->rules, list) {
8974 if (nft_is_active_next(net, rule)) {
8975 data_size += sizeof(*prule) + rule->dlen;
8976 if (data_size > INT_MAX)
8981 chain->blob_next = nf_tables_chain_alloc_rules(chain, data_size);
8982 if (!chain->blob_next)
8985 data = (void *)chain->blob_next->data;
8986 data_boundary = data + data_size;
8989 list_for_each_entry(rule, &chain->rules, list) {
8990 if (!nft_is_active_next(net, rule))
8993 prule = (struct nft_rule_dp *)data;
8994 data += offsetof(struct nft_rule_dp, data);
8995 if (WARN_ON_ONCE(data > data_boundary))
8999 track.last = nft_expr_last(rule);
9000 nft_rule_for_each_expr(expr, last, rule) {
9003 if (nft_expr_reduce(&track, expr)) {
9008 if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
9011 memcpy(data + size, expr, expr->ops->size);
9012 size += expr->ops->size;
9014 if (WARN_ON_ONCE(size >= 1 << 12))
9017 prule->handle = rule->handle;
9023 chain->blob_next->size += (unsigned long)(data - (void *)prule);
9026 if (WARN_ON_ONCE(data > data_boundary))
9029 prule = (struct nft_rule_dp *)data;
9030 nft_last_rule(chain, prule);
9035 static void nf_tables_commit_chain_prepare_cancel(struct net *net)
9037 struct nftables_pernet *nft_net = nft_pernet(net);
9038 struct nft_trans *trans, *next;
9040 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
9041 struct nft_chain *chain = trans->ctx.chain;
9043 if (trans->msg_type == NFT_MSG_NEWRULE ||
9044 trans->msg_type == NFT_MSG_DELRULE) {
9045 kvfree(chain->blob_next);
9046 chain->blob_next = NULL;
9051 static void __nf_tables_commit_chain_free_rules(struct rcu_head *h)
9053 struct nft_rule_dp_last *l = container_of(h, struct nft_rule_dp_last, h);
9058 static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
9060 struct nft_rule_dp_last *last;
9062 /* last rule trailer is after end marker */
9063 last = (void *)blob + sizeof(*blob) + blob->size;
9066 call_rcu(&last->h, __nf_tables_commit_chain_free_rules);
9069 static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
9071 struct nft_rule_blob *g0, *g1;
9074 next_genbit = nft_gencursor_next(net);
9076 g0 = rcu_dereference_protected(chain->blob_gen_0,
9077 lockdep_commit_lock_is_held(net));
9078 g1 = rcu_dereference_protected(chain->blob_gen_1,
9079 lockdep_commit_lock_is_held(net));
9081 /* No changes to this chain? */
9082 if (chain->blob_next == NULL) {
9083 /* chain had no change in last or next generation */
9087 * chain had no change in this generation; make sure next
9088 * one uses same rules as current generation.
9091 rcu_assign_pointer(chain->blob_gen_1, g0);
9092 nf_tables_commit_chain_free_rules_old(g1);
9094 rcu_assign_pointer(chain->blob_gen_0, g1);
9095 nf_tables_commit_chain_free_rules_old(g0);
9102 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
9104 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
9106 chain->blob_next = NULL;
9112 nf_tables_commit_chain_free_rules_old(g1);
9114 nf_tables_commit_chain_free_rules_old(g0);
9117 static void nft_obj_del(struct nft_object *obj)
9119 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
9120 list_del_rcu(&obj->list);
9123 void nft_chain_del(struct nft_chain *chain)
9125 struct nft_table *table = chain->table;
9127 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
9128 nft_chain_ht_params));
9129 list_del_rcu(&chain->list);
9132 static void nf_tables_module_autoload_cleanup(struct net *net)
9134 struct nftables_pernet *nft_net = nft_pernet(net);
9135 struct nft_module_request *req, *next;
9137 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
9138 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
9139 WARN_ON_ONCE(!req->done);
9140 list_del(&req->list);
9145 static void nf_tables_commit_release(struct net *net)
9147 struct nftables_pernet *nft_net = nft_pernet(net);
9148 struct nft_trans *trans;
9150 /* all side effects have to be made visible.
9151 * For example, if a chain named 'foo' has been deleted, a
9152 * new transaction must not find it anymore.
9154 * Memory reclaim happens asynchronously from work queue
9155 * to prevent expensive synchronize_rcu() in commit phase.
9157 if (list_empty(&nft_net->commit_list)) {
9158 nf_tables_module_autoload_cleanup(net);
9159 mutex_unlock(&nft_net->commit_mutex);
9163 trans = list_last_entry(&nft_net->commit_list,
9164 struct nft_trans, list);
9165 get_net(trans->ctx.net);
9166 WARN_ON_ONCE(trans->put_net);
9168 trans->put_net = true;
9169 spin_lock(&nf_tables_destroy_list_lock);
9170 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
9171 spin_unlock(&nf_tables_destroy_list_lock);
9173 nf_tables_module_autoload_cleanup(net);
9174 schedule_work(&trans_destroy_work);
9176 mutex_unlock(&nft_net->commit_mutex);
9179 static void nft_commit_notify(struct net *net, u32 portid)
9181 struct nftables_pernet *nft_net = nft_pernet(net);
9182 struct sk_buff *batch_skb = NULL, *nskb, *skb;
9183 unsigned char *data;
9186 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
9190 len = NLMSG_GOODSIZE - skb->len;
9191 list_del(&skb->list);
9195 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
9196 data = skb_put(batch_skb, skb->len);
9197 memcpy(data, skb->data, skb->len);
9198 list_del(&skb->list);
9202 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9203 NFT_CB(batch_skb).report, GFP_KERNEL);
9208 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9209 NFT_CB(batch_skb).report, GFP_KERNEL);
9212 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
9215 static int nf_tables_commit_audit_alloc(struct list_head *adl,
9216 struct nft_table *table)
9218 struct nft_audit_data *adp;
9220 list_for_each_entry(adp, adl, list) {
9221 if (adp->table == table)
9224 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
9228 list_add(&adp->list, adl);
9232 static void nf_tables_commit_audit_free(struct list_head *adl)
9234 struct nft_audit_data *adp, *adn;
9236 list_for_each_entry_safe(adp, adn, adl, list) {
9237 list_del(&adp->list);
9242 static void nf_tables_commit_audit_collect(struct list_head *adl,
9243 struct nft_table *table, u32 op)
9245 struct nft_audit_data *adp;
9247 list_for_each_entry(adp, adl, list) {
9248 if (adp->table == table)
9251 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
9255 if (!adp->op || adp->op > op)
9259 #define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
9261 static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
9263 struct nft_audit_data *adp, *adn;
9264 char aubuf[AUNFTABLENAMELEN];
9266 list_for_each_entry_safe(adp, adn, adl, list) {
9267 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
9269 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
9270 nft2audit_op[adp->op], GFP_KERNEL);
9271 list_del(&adp->list);
9276 static int nf_tables_commit(struct net *net, struct sk_buff *skb)
9278 struct nftables_pernet *nft_net = nft_pernet(net);
9279 struct nft_trans *trans, *next;
9280 struct nft_trans_elem *te;
9281 struct nft_chain *chain;
9282 struct nft_table *table;
9283 unsigned int base_seq;
9287 if (list_empty(&nft_net->commit_list)) {
9288 mutex_unlock(&nft_net->commit_mutex);
9292 /* 0. Validate ruleset, otherwise roll back for error reporting. */
9293 if (nf_tables_validate(net) < 0)
9296 err = nft_flow_rule_offload_commit(net);
9300 /* 1. Allocate space for next generation rules_gen_X[] */
9301 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
9304 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
9306 nf_tables_commit_chain_prepare_cancel(net);
9307 nf_tables_commit_audit_free(&adl);
9310 if (trans->msg_type == NFT_MSG_NEWRULE ||
9311 trans->msg_type == NFT_MSG_DELRULE) {
9312 chain = trans->ctx.chain;
9314 ret = nf_tables_commit_chain_prepare(net, chain);
9316 nf_tables_commit_chain_prepare_cancel(net);
9317 nf_tables_commit_audit_free(&adl);
9323 /* step 2. Make rules_gen_X visible to packet path */
9324 list_for_each_entry(table, &nft_net->tables, list) {
9325 list_for_each_entry(chain, &table->chains, list)
9326 nf_tables_commit_chain(net, chain);
9330 * Bump generation counter, invalidate any dump in progress.
9331 * Cannot fail after this point.
9333 base_seq = READ_ONCE(nft_net->base_seq);
9334 while (++base_seq == 0)
9337 WRITE_ONCE(nft_net->base_seq, base_seq);
9339 /* step 3. Start new generation, rules_gen_X now in use. */
9340 net->nft.gencursor = nft_gencursor_next(net);
9342 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
9343 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
9345 switch (trans->msg_type) {
9346 case NFT_MSG_NEWTABLE:
9347 if (nft_trans_table_update(trans)) {
9348 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9349 nft_trans_destroy(trans);
9352 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
9353 nf_tables_table_disable(net, trans->ctx.table);
9355 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
9357 nft_clear(net, trans->ctx.table);
9359 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
9360 nft_trans_destroy(trans);
9362 case NFT_MSG_DELTABLE:
9363 case NFT_MSG_DESTROYTABLE:
9364 list_del_rcu(&trans->ctx.table->list);
9365 nf_tables_table_notify(&trans->ctx, trans->msg_type);
9367 case NFT_MSG_NEWCHAIN:
9368 if (nft_trans_chain_update(trans)) {
9369 nft_chain_commit_update(trans);
9370 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN,
9371 &nft_trans_chain_hooks(trans));
9372 list_splice(&nft_trans_chain_hooks(trans),
9373 &nft_trans_basechain(trans)->hook_list);
9374 /* trans destroyed after rcu grace period */
9376 nft_chain_commit_drop_policy(trans);
9377 nft_clear(net, trans->ctx.chain);
9378 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
9379 nft_trans_destroy(trans);
9382 case NFT_MSG_DELCHAIN:
9383 case NFT_MSG_DESTROYCHAIN:
9384 if (nft_trans_chain_update(trans)) {
9385 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9386 &nft_trans_chain_hooks(trans));
9387 nft_netdev_unregister_hooks(net,
9388 &nft_trans_chain_hooks(trans),
9391 nft_chain_del(trans->ctx.chain);
9392 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9394 nf_tables_unregister_hook(trans->ctx.net,
9399 case NFT_MSG_NEWRULE:
9400 nft_clear(trans->ctx.net, nft_trans_rule(trans));
9401 nf_tables_rule_notify(&trans->ctx,
9402 nft_trans_rule(trans),
9404 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9405 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9407 nft_trans_destroy(trans);
9409 case NFT_MSG_DELRULE:
9410 case NFT_MSG_DESTROYRULE:
9411 list_del_rcu(&nft_trans_rule(trans)->list);
9412 nf_tables_rule_notify(&trans->ctx,
9413 nft_trans_rule(trans),
9415 nft_rule_expr_deactivate(&trans->ctx,
9416 nft_trans_rule(trans),
9419 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9420 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9422 case NFT_MSG_NEWSET:
9423 if (nft_trans_set_update(trans)) {
9424 struct nft_set *set = nft_trans_set(trans);
9426 WRITE_ONCE(set->timeout, nft_trans_set_timeout(trans));
9427 WRITE_ONCE(set->gc_int, nft_trans_set_gc_int(trans));
9429 nft_clear(net, nft_trans_set(trans));
9430 /* This avoids hitting -EBUSY when deleting the table
9431 * from the transaction.
9433 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
9434 !list_empty(&nft_trans_set(trans)->bindings))
9435 trans->ctx.table->use--;
9437 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
9438 NFT_MSG_NEWSET, GFP_KERNEL);
9439 nft_trans_destroy(trans);
9441 case NFT_MSG_DELSET:
9442 case NFT_MSG_DESTROYSET:
9443 list_del_rcu(&nft_trans_set(trans)->list);
9444 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
9445 trans->msg_type, GFP_KERNEL);
9447 case NFT_MSG_NEWSETELEM:
9448 te = (struct nft_trans_elem *)trans->data;
9450 nft_setelem_activate(net, te->set, &te->elem);
9451 nf_tables_setelem_notify(&trans->ctx, te->set,
9453 NFT_MSG_NEWSETELEM);
9454 nft_trans_destroy(trans);
9456 case NFT_MSG_DELSETELEM:
9457 case NFT_MSG_DESTROYSETELEM:
9458 te = (struct nft_trans_elem *)trans->data;
9460 nf_tables_setelem_notify(&trans->ctx, te->set,
9463 nft_setelem_remove(net, te->set, &te->elem);
9464 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9465 atomic_dec(&te->set->nelems);
9469 case NFT_MSG_NEWOBJ:
9470 if (nft_trans_obj_update(trans)) {
9471 nft_obj_commit_update(trans);
9472 nf_tables_obj_notify(&trans->ctx,
9473 nft_trans_obj(trans),
9476 nft_clear(net, nft_trans_obj(trans));
9477 nf_tables_obj_notify(&trans->ctx,
9478 nft_trans_obj(trans),
9480 nft_trans_destroy(trans);
9483 case NFT_MSG_DELOBJ:
9484 case NFT_MSG_DESTROYOBJ:
9485 nft_obj_del(nft_trans_obj(trans));
9486 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
9489 case NFT_MSG_NEWFLOWTABLE:
9490 if (nft_trans_flowtable_update(trans)) {
9491 nft_trans_flowtable(trans)->data.flags =
9492 nft_trans_flowtable_flags(trans);
9493 nf_tables_flowtable_notify(&trans->ctx,
9494 nft_trans_flowtable(trans),
9495 &nft_trans_flowtable_hooks(trans),
9496 NFT_MSG_NEWFLOWTABLE);
9497 list_splice(&nft_trans_flowtable_hooks(trans),
9498 &nft_trans_flowtable(trans)->hook_list);
9500 nft_clear(net, nft_trans_flowtable(trans));
9501 nf_tables_flowtable_notify(&trans->ctx,
9502 nft_trans_flowtable(trans),
9504 NFT_MSG_NEWFLOWTABLE);
9506 nft_trans_destroy(trans);
9508 case NFT_MSG_DELFLOWTABLE:
9509 case NFT_MSG_DESTROYFLOWTABLE:
9510 if (nft_trans_flowtable_update(trans)) {
9511 nf_tables_flowtable_notify(&trans->ctx,
9512 nft_trans_flowtable(trans),
9513 &nft_trans_flowtable_hooks(trans),
9515 nft_unregister_flowtable_net_hooks(net,
9516 &nft_trans_flowtable_hooks(trans));
9518 list_del_rcu(&nft_trans_flowtable(trans)->list);
9519 nf_tables_flowtable_notify(&trans->ctx,
9520 nft_trans_flowtable(trans),
9523 nft_unregister_flowtable_net_hooks(net,
9524 &nft_trans_flowtable(trans)->hook_list);
9530 nft_commit_notify(net, NETLINK_CB(skb).portid);
9531 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
9532 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
9533 nf_tables_commit_release(net);
9538 static void nf_tables_module_autoload(struct net *net)
9540 struct nftables_pernet *nft_net = nft_pernet(net);
9541 struct nft_module_request *req, *next;
9542 LIST_HEAD(module_list);
9544 list_splice_init(&nft_net->module_list, &module_list);
9545 mutex_unlock(&nft_net->commit_mutex);
9546 list_for_each_entry_safe(req, next, &module_list, list) {
9547 request_module("%s", req->module);
9550 mutex_lock(&nft_net->commit_mutex);
9551 list_splice(&module_list, &nft_net->module_list);
9554 static void nf_tables_abort_release(struct nft_trans *trans)
9556 switch (trans->msg_type) {
9557 case NFT_MSG_NEWTABLE:
9558 nf_tables_table_destroy(&trans->ctx);
9560 case NFT_MSG_NEWCHAIN:
9561 if (nft_trans_chain_update(trans))
9562 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9564 nf_tables_chain_destroy(&trans->ctx);
9566 case NFT_MSG_NEWRULE:
9567 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9569 case NFT_MSG_NEWSET:
9570 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
9572 case NFT_MSG_NEWSETELEM:
9573 nft_set_elem_destroy(nft_trans_elem_set(trans),
9574 nft_trans_elem(trans).priv, true);
9576 case NFT_MSG_NEWOBJ:
9577 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
9579 case NFT_MSG_NEWFLOWTABLE:
9580 if (nft_trans_flowtable_update(trans))
9581 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
9583 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
9589 static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
9591 struct nftables_pernet *nft_net = nft_pernet(net);
9592 struct nft_trans *trans, *next;
9593 struct nft_trans_elem *te;
9595 if (action == NFNL_ABORT_VALIDATE &&
9596 nf_tables_validate(net) < 0)
9599 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
9601 switch (trans->msg_type) {
9602 case NFT_MSG_NEWTABLE:
9603 if (nft_trans_table_update(trans)) {
9604 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9605 nft_trans_destroy(trans);
9608 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
9609 nf_tables_table_disable(net, trans->ctx.table);
9610 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
9611 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
9612 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
9614 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
9615 nft_trans_destroy(trans);
9617 list_del_rcu(&trans->ctx.table->list);
9620 case NFT_MSG_DELTABLE:
9621 case NFT_MSG_DESTROYTABLE:
9622 nft_clear(trans->ctx.net, trans->ctx.table);
9623 nft_trans_destroy(trans);
9625 case NFT_MSG_NEWCHAIN:
9626 if (nft_trans_chain_update(trans)) {
9627 nft_netdev_unregister_hooks(net,
9628 &nft_trans_chain_hooks(trans),
9630 free_percpu(nft_trans_chain_stats(trans));
9631 kfree(nft_trans_chain_name(trans));
9632 nft_trans_destroy(trans);
9634 if (nft_chain_is_bound(trans->ctx.chain)) {
9635 nft_trans_destroy(trans);
9638 trans->ctx.table->use--;
9639 nft_chain_del(trans->ctx.chain);
9640 nf_tables_unregister_hook(trans->ctx.net,
9645 case NFT_MSG_DELCHAIN:
9646 case NFT_MSG_DESTROYCHAIN:
9647 if (nft_trans_chain_update(trans)) {
9648 list_splice(&nft_trans_chain_hooks(trans),
9649 &nft_trans_basechain(trans)->hook_list);
9651 trans->ctx.table->use++;
9652 nft_clear(trans->ctx.net, trans->ctx.chain);
9654 nft_trans_destroy(trans);
9656 case NFT_MSG_NEWRULE:
9657 trans->ctx.chain->use--;
9658 list_del_rcu(&nft_trans_rule(trans)->list);
9659 nft_rule_expr_deactivate(&trans->ctx,
9660 nft_trans_rule(trans),
9662 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9663 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9665 case NFT_MSG_DELRULE:
9666 case NFT_MSG_DESTROYRULE:
9667 trans->ctx.chain->use++;
9668 nft_clear(trans->ctx.net, nft_trans_rule(trans));
9669 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
9670 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9671 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9673 nft_trans_destroy(trans);
9675 case NFT_MSG_NEWSET:
9676 if (nft_trans_set_update(trans)) {
9677 nft_trans_destroy(trans);
9680 trans->ctx.table->use--;
9681 if (nft_trans_set_bound(trans)) {
9682 nft_trans_destroy(trans);
9685 list_del_rcu(&nft_trans_set(trans)->list);
9687 case NFT_MSG_DELSET:
9688 case NFT_MSG_DESTROYSET:
9689 trans->ctx.table->use++;
9690 nft_clear(trans->ctx.net, nft_trans_set(trans));
9691 nft_trans_destroy(trans);
9693 case NFT_MSG_NEWSETELEM:
9694 if (nft_trans_elem_set_bound(trans)) {
9695 nft_trans_destroy(trans);
9698 te = (struct nft_trans_elem *)trans->data;
9699 nft_setelem_remove(net, te->set, &te->elem);
9700 if (!nft_setelem_is_catchall(te->set, &te->elem))
9701 atomic_dec(&te->set->nelems);
9703 case NFT_MSG_DELSETELEM:
9704 case NFT_MSG_DESTROYSETELEM:
9705 te = (struct nft_trans_elem *)trans->data;
9707 nft_setelem_data_activate(net, te->set, &te->elem);
9708 nft_setelem_activate(net, te->set, &te->elem);
9709 if (!nft_setelem_is_catchall(te->set, &te->elem))
9712 nft_trans_destroy(trans);
9714 case NFT_MSG_NEWOBJ:
9715 if (nft_trans_obj_update(trans)) {
9716 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
9717 nft_trans_destroy(trans);
9719 trans->ctx.table->use--;
9720 nft_obj_del(nft_trans_obj(trans));
9723 case NFT_MSG_DELOBJ:
9724 case NFT_MSG_DESTROYOBJ:
9725 trans->ctx.table->use++;
9726 nft_clear(trans->ctx.net, nft_trans_obj(trans));
9727 nft_trans_destroy(trans);
9729 case NFT_MSG_NEWFLOWTABLE:
9730 if (nft_trans_flowtable_update(trans)) {
9731 nft_unregister_flowtable_net_hooks(net,
9732 &nft_trans_flowtable_hooks(trans));
9734 trans->ctx.table->use--;
9735 list_del_rcu(&nft_trans_flowtable(trans)->list);
9736 nft_unregister_flowtable_net_hooks(net,
9737 &nft_trans_flowtable(trans)->hook_list);
9740 case NFT_MSG_DELFLOWTABLE:
9741 case NFT_MSG_DESTROYFLOWTABLE:
9742 if (nft_trans_flowtable_update(trans)) {
9743 list_splice(&nft_trans_flowtable_hooks(trans),
9744 &nft_trans_flowtable(trans)->hook_list);
9746 trans->ctx.table->use++;
9747 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9749 nft_trans_destroy(trans);
9756 list_for_each_entry_safe_reverse(trans, next,
9757 &nft_net->commit_list, list) {
9758 list_del(&trans->list);
9759 nf_tables_abort_release(trans);
9762 if (action == NFNL_ABORT_AUTOLOAD)
9763 nf_tables_module_autoload(net);
9765 nf_tables_module_autoload_cleanup(net);
9770 static int nf_tables_abort(struct net *net, struct sk_buff *skb,
9771 enum nfnl_abort_action action)
9773 struct nftables_pernet *nft_net = nft_pernet(net);
9774 int ret = __nf_tables_abort(net, action);
9776 mutex_unlock(&nft_net->commit_mutex);
9781 static bool nf_tables_valid_genid(struct net *net, u32 genid)
9783 struct nftables_pernet *nft_net = nft_pernet(net);
9786 mutex_lock(&nft_net->commit_mutex);
9788 genid_ok = genid == 0 || nft_net->base_seq == genid;
9790 mutex_unlock(&nft_net->commit_mutex);
9792 /* else, commit mutex has to be released by commit or abort function */
9796 static const struct nfnetlink_subsystem nf_tables_subsys = {
9797 .name = "nf_tables",
9798 .subsys_id = NFNL_SUBSYS_NFTABLES,
9799 .cb_count = NFT_MSG_MAX,
9801 .commit = nf_tables_commit,
9802 .abort = nf_tables_abort,
9803 .valid_genid = nf_tables_valid_genid,
9804 .owner = THIS_MODULE,
9807 int nft_chain_validate_dependency(const struct nft_chain *chain,
9808 enum nft_chain_types type)
9810 const struct nft_base_chain *basechain;
9812 if (nft_is_base_chain(chain)) {
9813 basechain = nft_base_chain(chain);
9814 if (basechain->type->type != type)
9819 EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
9821 int nft_chain_validate_hooks(const struct nft_chain *chain,
9822 unsigned int hook_flags)
9824 struct nft_base_chain *basechain;
9826 if (nft_is_base_chain(chain)) {
9827 basechain = nft_base_chain(chain);
9829 if ((1 << basechain->ops.hooknum) & hook_flags)
9837 EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
9840 * Loop detection - walk through the ruleset beginning at the destination chain
9841 * of a new jump until either the source chain is reached (loop) or all
9842 * reachable chains have been traversed.
9844 * The loop check is performed whenever a new jump verdict is added to an
9845 * expression or verdict map or a verdict map is bound to a new chain.
9848 static int nf_tables_check_loops(const struct nft_ctx *ctx,
9849 const struct nft_chain *chain);
9851 static int nft_check_loops(const struct nft_ctx *ctx,
9852 const struct nft_set_ext *ext)
9854 const struct nft_data *data;
9857 data = nft_set_ext_data(ext);
9858 switch (data->verdict.code) {
9861 ret = nf_tables_check_loops(ctx, data->verdict.chain);
9871 static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
9872 struct nft_set *set,
9873 const struct nft_set_iter *iter,
9874 struct nft_set_elem *elem)
9876 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
9878 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
9879 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
9882 return nft_check_loops(ctx, ext);
9885 static int nft_set_catchall_loops(const struct nft_ctx *ctx,
9886 struct nft_set *set)
9888 u8 genmask = nft_genmask_next(ctx->net);
9889 struct nft_set_elem_catchall *catchall;
9890 struct nft_set_ext *ext;
9893 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9894 ext = nft_set_elem_ext(set, catchall->elem);
9895 if (!nft_set_elem_active(ext, genmask))
9898 ret = nft_check_loops(ctx, ext);
9906 static int nf_tables_check_loops(const struct nft_ctx *ctx,
9907 const struct nft_chain *chain)
9909 const struct nft_rule *rule;
9910 const struct nft_expr *expr, *last;
9911 struct nft_set *set;
9912 struct nft_set_binding *binding;
9913 struct nft_set_iter iter;
9915 if (ctx->chain == chain)
9918 list_for_each_entry(rule, &chain->rules, list) {
9919 nft_rule_for_each_expr(expr, last, rule) {
9920 struct nft_immediate_expr *priv;
9921 const struct nft_data *data;
9924 if (strcmp(expr->ops->type->name, "immediate"))
9927 priv = nft_expr_priv(expr);
9928 if (priv->dreg != NFT_REG_VERDICT)
9932 switch (data->verdict.code) {
9935 err = nf_tables_check_loops(ctx,
9936 data->verdict.chain);
9946 list_for_each_entry(set, &ctx->table->sets, list) {
9947 if (!nft_is_active_next(ctx->net, set))
9949 if (!(set->flags & NFT_SET_MAP) ||
9950 set->dtype != NFT_DATA_VERDICT)
9953 list_for_each_entry(binding, &set->bindings, list) {
9954 if (!(binding->flags & NFT_SET_MAP) ||
9955 binding->chain != chain)
9958 iter.genmask = nft_genmask_next(ctx->net);
9962 iter.fn = nf_tables_loop_check_setelem;
9964 set->ops->walk(ctx, set, &iter);
9966 iter.err = nft_set_catchall_loops(ctx, set);
9977 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
9979 * @attr: netlink attribute to fetch value from
9980 * @max: maximum value to be stored in dest
9981 * @dest: pointer to the variable
9983 * Parse, check and store a given u32 netlink attribute into variable.
9984 * This function returns -ERANGE if the value goes over maximum value.
9985 * Otherwise a 0 is returned and the attribute value is stored in the
9986 * destination variable.
9988 int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
9992 val = ntohl(nla_get_be32(attr));
9999 EXPORT_SYMBOL_GPL(nft_parse_u32_check);
10001 static int nft_parse_register(const struct nlattr *attr, u32 *preg)
10005 reg = ntohl(nla_get_be32(attr));
10007 case NFT_REG_VERDICT...NFT_REG_4:
10008 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
10010 case NFT_REG32_00...NFT_REG32_15:
10011 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
10021 * nft_dump_register - dump a register value to a netlink attribute
10023 * @skb: socket buffer
10024 * @attr: attribute number
10025 * @reg: register number
10027 * Construct a netlink attribute containing the register number. For
10028 * compatibility reasons, register numbers being a multiple of 4 are
10029 * translated to the corresponding 128 bit register numbers.
10031 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
10033 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
10034 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
10036 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
10038 return nla_put_be32(skb, attr, htonl(reg));
10040 EXPORT_SYMBOL_GPL(nft_dump_register);
10042 static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
10044 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
10048 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
10054 int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
10059 err = nft_parse_register(attr, ®);
10063 err = nft_validate_register_load(reg, len);
10070 EXPORT_SYMBOL_GPL(nft_parse_register_load);
10072 static int nft_validate_register_store(const struct nft_ctx *ctx,
10073 enum nft_registers reg,
10074 const struct nft_data *data,
10075 enum nft_data_types type,
10081 case NFT_REG_VERDICT:
10082 if (type != NFT_DATA_VERDICT)
10085 if (data != NULL &&
10086 (data->verdict.code == NFT_GOTO ||
10087 data->verdict.code == NFT_JUMP)) {
10088 err = nf_tables_check_loops(ctx, data->verdict.chain);
10095 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
10099 if (reg * NFT_REG32_SIZE + len >
10100 sizeof_field(struct nft_regs, data))
10103 if (data != NULL && type != NFT_DATA_VALUE)
10109 int nft_parse_register_store(const struct nft_ctx *ctx,
10110 const struct nlattr *attr, u8 *dreg,
10111 const struct nft_data *data,
10112 enum nft_data_types type, unsigned int len)
10117 err = nft_parse_register(attr, ®);
10121 err = nft_validate_register_store(ctx, reg, data, type, len);
10128 EXPORT_SYMBOL_GPL(nft_parse_register_store);
10130 static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
10131 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
10132 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
10133 .len = NFT_CHAIN_MAXNAMELEN - 1 },
10134 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
10137 static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
10138 struct nft_data_desc *desc, const struct nlattr *nla)
10140 u8 genmask = nft_genmask_next(ctx->net);
10141 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
10142 struct nft_chain *chain;
10145 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
10146 nft_verdict_policy, NULL);
10150 if (!tb[NFTA_VERDICT_CODE])
10152 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
10154 switch (data->verdict.code) {
10156 switch (data->verdict.code & NF_VERDICT_MASK) {
10171 if (tb[NFTA_VERDICT_CHAIN]) {
10172 chain = nft_chain_lookup(ctx->net, ctx->table,
10173 tb[NFTA_VERDICT_CHAIN],
10175 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
10176 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
10177 tb[NFTA_VERDICT_CHAIN_ID]);
10179 return PTR_ERR(chain);
10185 return PTR_ERR(chain);
10186 if (nft_is_base_chain(chain))
10187 return -EOPNOTSUPP;
10188 if (nft_chain_is_bound(chain))
10190 if (desc->flags & NFT_DATA_DESC_SETELEM &&
10191 chain->flags & NFT_CHAIN_BINDING)
10195 data->verdict.chain = chain;
10199 desc->len = sizeof(data->verdict);
10204 static void nft_verdict_uninit(const struct nft_data *data)
10206 struct nft_chain *chain;
10207 struct nft_rule *rule;
10209 switch (data->verdict.code) {
10212 chain = data->verdict.chain;
10215 if (!nft_chain_is_bound(chain))
10218 chain->table->use--;
10219 list_for_each_entry(rule, &chain->rules, list)
10222 nft_chain_del(chain);
10227 int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
10229 struct nlattr *nest;
10231 nest = nla_nest_start_noflag(skb, type);
10233 goto nla_put_failure;
10235 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
10236 goto nla_put_failure;
10241 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
10243 goto nla_put_failure;
10245 nla_nest_end(skb, nest);
10252 static int nft_value_init(const struct nft_ctx *ctx,
10253 struct nft_data *data, struct nft_data_desc *desc,
10254 const struct nlattr *nla)
10258 len = nla_len(nla);
10261 if (len > desc->size)
10264 if (len != desc->len)
10270 nla_memcpy(data->data, nla, len);
10275 static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
10278 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
10281 static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
10282 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
10283 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
10287 * nft_data_init - parse nf_tables data netlink attributes
10289 * @ctx: context of the expression using the data
10290 * @data: destination struct nft_data
10291 * @desc: data description
10292 * @nla: netlink attribute containing data
10294 * Parse the netlink data attributes and initialize a struct nft_data.
10295 * The type and length of data are returned in the data description.
10297 * The caller can indicate that it only wants to accept data of type
10298 * NFT_DATA_VALUE by passing NULL for the ctx argument.
10300 int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
10301 struct nft_data_desc *desc, const struct nlattr *nla)
10303 struct nlattr *tb[NFTA_DATA_MAX + 1];
10306 if (WARN_ON_ONCE(!desc->size))
10309 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
10310 nft_data_policy, NULL);
10314 if (tb[NFTA_DATA_VALUE]) {
10315 if (desc->type != NFT_DATA_VALUE)
10318 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
10319 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
10320 if (desc->type != NFT_DATA_VERDICT)
10323 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
10330 EXPORT_SYMBOL_GPL(nft_data_init);
10333 * nft_data_release - release a nft_data item
10335 * @data: struct nft_data to release
10336 * @type: type of data
10338 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
10339 * all others need to be released by calling this function.
10341 void nft_data_release(const struct nft_data *data, enum nft_data_types type)
10343 if (type < NFT_DATA_VERDICT)
10346 case NFT_DATA_VERDICT:
10347 return nft_verdict_uninit(data);
10352 EXPORT_SYMBOL_GPL(nft_data_release);
10354 int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
10355 enum nft_data_types type, unsigned int len)
10357 struct nlattr *nest;
10360 nest = nla_nest_start_noflag(skb, attr);
10365 case NFT_DATA_VALUE:
10366 err = nft_value_dump(skb, data, len);
10368 case NFT_DATA_VERDICT:
10369 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
10376 nla_nest_end(skb, nest);
10379 EXPORT_SYMBOL_GPL(nft_data_dump);
10381 int __nft_release_basechain(struct nft_ctx *ctx)
10383 struct nft_rule *rule, *nr;
10385 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
10388 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
10389 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
10390 list_del(&rule->list);
10392 nf_tables_rule_release(ctx, rule);
10394 nft_chain_del(ctx->chain);
10396 nf_tables_chain_destroy(ctx);
10400 EXPORT_SYMBOL_GPL(__nft_release_basechain);
10402 static void __nft_release_hook(struct net *net, struct nft_table *table)
10404 struct nft_flowtable *flowtable;
10405 struct nft_chain *chain;
10407 list_for_each_entry(chain, &table->chains, list)
10408 __nf_tables_unregister_hook(net, table, chain, true);
10409 list_for_each_entry(flowtable, &table->flowtables, list)
10410 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
10414 static void __nft_release_hooks(struct net *net)
10416 struct nftables_pernet *nft_net = nft_pernet(net);
10417 struct nft_table *table;
10419 list_for_each_entry(table, &nft_net->tables, list) {
10420 if (nft_table_has_owner(table))
10423 __nft_release_hook(net, table);
10427 static void __nft_release_table(struct net *net, struct nft_table *table)
10429 struct nft_flowtable *flowtable, *nf;
10430 struct nft_chain *chain, *nc;
10431 struct nft_object *obj, *ne;
10432 struct nft_rule *rule, *nr;
10433 struct nft_set *set, *ns;
10434 struct nft_ctx ctx = {
10436 .family = NFPROTO_NETDEV,
10439 ctx.family = table->family;
10441 list_for_each_entry(chain, &table->chains, list) {
10443 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
10444 list_del(&rule->list);
10446 nf_tables_rule_release(&ctx, rule);
10449 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
10450 list_del(&flowtable->list);
10452 nf_tables_flowtable_destroy(flowtable);
10454 list_for_each_entry_safe(set, ns, &table->sets, list) {
10455 list_del(&set->list);
10457 nft_set_destroy(&ctx, set);
10459 list_for_each_entry_safe(obj, ne, &table->objects, list) {
10462 nft_obj_destroy(&ctx, obj);
10464 list_for_each_entry_safe(chain, nc, &table->chains, list) {
10466 nft_chain_del(chain);
10468 nf_tables_chain_destroy(&ctx);
10470 nf_tables_table_destroy(&ctx);
10473 static void __nft_release_tables(struct net *net)
10475 struct nftables_pernet *nft_net = nft_pernet(net);
10476 struct nft_table *table, *nt;
10478 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
10479 if (nft_table_has_owner(table))
10482 list_del(&table->list);
10484 __nft_release_table(net, table);
10488 static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
10491 struct nft_table *table, *to_delete[8];
10492 struct nftables_pernet *nft_net;
10493 struct netlink_notify *n = ptr;
10494 struct net *net = n->net;
10495 unsigned int deleted;
10496 bool restart = false;
10498 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
10499 return NOTIFY_DONE;
10501 nft_net = nft_pernet(net);
10503 mutex_lock(&nft_net->commit_mutex);
10504 if (!list_empty(&nf_tables_destroy_list))
10507 list_for_each_entry(table, &nft_net->tables, list) {
10508 if (nft_table_has_owner(table) &&
10509 n->portid == table->nlpid) {
10510 __nft_release_hook(net, table);
10511 list_del_rcu(&table->list);
10512 to_delete[deleted++] = table;
10513 if (deleted >= ARRAY_SIZE(to_delete))
10518 restart = deleted >= ARRAY_SIZE(to_delete);
10521 __nft_release_table(net, to_delete[--deleted]);
10526 mutex_unlock(&nft_net->commit_mutex);
10528 return NOTIFY_DONE;
10531 static struct notifier_block nft_nl_notifier = {
10532 .notifier_call = nft_rcv_nl_event,
10535 static int __net_init nf_tables_init_net(struct net *net)
10537 struct nftables_pernet *nft_net = nft_pernet(net);
10539 INIT_LIST_HEAD(&nft_net->tables);
10540 INIT_LIST_HEAD(&nft_net->commit_list);
10541 INIT_LIST_HEAD(&nft_net->module_list);
10542 INIT_LIST_HEAD(&nft_net->notify_list);
10543 mutex_init(&nft_net->commit_mutex);
10544 nft_net->base_seq = 1;
10549 static void __net_exit nf_tables_pre_exit_net(struct net *net)
10551 struct nftables_pernet *nft_net = nft_pernet(net);
10553 mutex_lock(&nft_net->commit_mutex);
10554 __nft_release_hooks(net);
10555 mutex_unlock(&nft_net->commit_mutex);
10558 static void __net_exit nf_tables_exit_net(struct net *net)
10560 struct nftables_pernet *nft_net = nft_pernet(net);
10562 mutex_lock(&nft_net->commit_mutex);
10563 if (!list_empty(&nft_net->commit_list) ||
10564 !list_empty(&nft_net->module_list))
10565 __nf_tables_abort(net, NFNL_ABORT_NONE);
10566 __nft_release_tables(net);
10567 mutex_unlock(&nft_net->commit_mutex);
10568 WARN_ON_ONCE(!list_empty(&nft_net->tables));
10569 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
10570 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
10573 static struct pernet_operations nf_tables_net_ops = {
10574 .init = nf_tables_init_net,
10575 .pre_exit = nf_tables_pre_exit_net,
10576 .exit = nf_tables_exit_net,
10577 .id = &nf_tables_net_id,
10578 .size = sizeof(struct nftables_pernet),
10581 static int __init nf_tables_module_init(void)
10585 err = register_pernet_subsys(&nf_tables_net_ops);
10589 err = nft_chain_filter_init();
10591 goto err_chain_filter;
10593 err = nf_tables_core_module_init();
10595 goto err_core_module;
10597 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
10599 goto err_netdev_notifier;
10601 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
10603 goto err_rht_objname;
10605 err = nft_offload_init();
10609 err = netlink_register_notifier(&nft_nl_notifier);
10611 goto err_netlink_notifier;
10614 err = nfnetlink_subsys_register(&nf_tables_subsys);
10616 goto err_nfnl_subsys;
10618 nft_chain_route_init();
10623 netlink_unregister_notifier(&nft_nl_notifier);
10624 err_netlink_notifier:
10625 nft_offload_exit();
10627 rhltable_destroy(&nft_objname_ht);
10629 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
10630 err_netdev_notifier:
10631 nf_tables_core_module_exit();
10633 nft_chain_filter_fini();
10635 unregister_pernet_subsys(&nf_tables_net_ops);
10639 static void __exit nf_tables_module_exit(void)
10641 nfnetlink_subsys_unregister(&nf_tables_subsys);
10642 netlink_unregister_notifier(&nft_nl_notifier);
10643 nft_offload_exit();
10644 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
10645 nft_chain_filter_fini();
10646 nft_chain_route_fini();
10647 unregister_pernet_subsys(&nf_tables_net_ops);
10648 cancel_work_sync(&trans_destroy_work);
10650 rhltable_destroy(&nft_objname_ht);
10651 nf_tables_core_module_exit();
10654 module_init(nf_tables_module_init);
10655 module_exit(nf_tables_module_exit);
10657 MODULE_LICENSE("GPL");
10658 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
10659 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);