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 static LIST_HEAD(nf_tables_expressions
);
29 static LIST_HEAD(nf_tables_objects
);
30 static LIST_HEAD(nf_tables_flowtables
);
31 static LIST_HEAD(nf_tables_destroy_list
);
32 static DEFINE_SPINLOCK(nf_tables_destroy_list_lock
);
33 static u64 table_handle
;
36 NFT_VALIDATE_SKIP
= 0,
41 static struct rhltable nft_objname_ht
;
43 static u32
nft_chain_hash(const void *data
, u32 len
, u32 seed
);
44 static u32
nft_chain_hash_obj(const void *data
, u32 len
, u32 seed
);
45 static int nft_chain_hash_cmp(struct rhashtable_compare_arg
*, const void *);
47 static u32
nft_objname_hash(const void *data
, u32 len
, u32 seed
);
48 static u32
nft_objname_hash_obj(const void *data
, u32 len
, u32 seed
);
49 static int nft_objname_hash_cmp(struct rhashtable_compare_arg
*, const void *);
51 static const struct rhashtable_params nft_chain_ht_params
= {
52 .head_offset
= offsetof(struct nft_chain
, rhlhead
),
53 .key_offset
= offsetof(struct nft_chain
, name
),
54 .hashfn
= nft_chain_hash
,
55 .obj_hashfn
= nft_chain_hash_obj
,
56 .obj_cmpfn
= nft_chain_hash_cmp
,
57 .automatic_shrinking
= true,
60 static const struct rhashtable_params nft_objname_ht_params
= {
61 .head_offset
= offsetof(struct nft_object
, rhlhead
),
62 .key_offset
= offsetof(struct nft_object
, key
),
63 .hashfn
= nft_objname_hash
,
64 .obj_hashfn
= nft_objname_hash_obj
,
65 .obj_cmpfn
= nft_objname_hash_cmp
,
66 .automatic_shrinking
= true,
69 static void nft_validate_state_update(struct net
*net
, u8 new_validate_state
)
71 switch (net
->nft
.validate_state
) {
72 case NFT_VALIDATE_SKIP
:
73 WARN_ON_ONCE(new_validate_state
== NFT_VALIDATE_DO
);
75 case NFT_VALIDATE_NEED
:
78 if (new_validate_state
== NFT_VALIDATE_NEED
)
82 net
->nft
.validate_state
= new_validate_state
;
84 static void nf_tables_trans_destroy_work(struct work_struct
*w
);
85 static DECLARE_WORK(trans_destroy_work
, nf_tables_trans_destroy_work
);
87 static void nft_ctx_init(struct nft_ctx
*ctx
,
89 const struct sk_buff
*skb
,
90 const struct nlmsghdr
*nlh
,
92 struct nft_table
*table
,
93 struct nft_chain
*chain
,
94 const struct nlattr
* const *nla
)
102 ctx
->portid
= NETLINK_CB(skb
).portid
;
103 ctx
->report
= nlmsg_report(nlh
);
104 ctx
->flags
= nlh
->nlmsg_flags
;
105 ctx
->seq
= nlh
->nlmsg_seq
;
108 static struct nft_trans
*nft_trans_alloc_gfp(const struct nft_ctx
*ctx
,
109 int msg_type
, u32 size
, gfp_t gfp
)
111 struct nft_trans
*trans
;
113 trans
= kzalloc(sizeof(struct nft_trans
) + size
, gfp
);
117 trans
->msg_type
= msg_type
;
123 static struct nft_trans
*nft_trans_alloc(const struct nft_ctx
*ctx
,
124 int msg_type
, u32 size
)
126 return nft_trans_alloc_gfp(ctx
, msg_type
, size
, GFP_KERNEL
);
129 static void nft_trans_destroy(struct nft_trans
*trans
)
131 list_del(&trans
->list
);
135 static void nft_set_trans_bind(const struct nft_ctx
*ctx
, struct nft_set
*set
)
137 struct net
*net
= ctx
->net
;
138 struct nft_trans
*trans
;
140 if (!nft_set_is_anonymous(set
))
143 list_for_each_entry_reverse(trans
, &net
->nft
.commit_list
, list
) {
144 switch (trans
->msg_type
) {
146 if (nft_trans_set(trans
) == set
)
147 nft_trans_set_bound(trans
) = true;
149 case NFT_MSG_NEWSETELEM
:
150 if (nft_trans_elem_set(trans
) == set
)
151 nft_trans_elem_set_bound(trans
) = true;
157 static int nft_netdev_register_hooks(struct net
*net
,
158 struct list_head
*hook_list
)
160 struct nft_hook
*hook
;
164 list_for_each_entry(hook
, hook_list
, list
) {
165 err
= nf_register_net_hook(net
, &hook
->ops
);
174 list_for_each_entry(hook
, hook_list
, list
) {
178 nf_unregister_net_hook(net
, &hook
->ops
);
183 static void nft_netdev_unregister_hooks(struct net
*net
,
184 struct list_head
*hook_list
)
186 struct nft_hook
*hook
;
188 list_for_each_entry(hook
, hook_list
, list
)
189 nf_unregister_net_hook(net
, &hook
->ops
);
192 static int nf_tables_register_hook(struct net
*net
,
193 const struct nft_table
*table
,
194 struct nft_chain
*chain
)
196 struct nft_base_chain
*basechain
;
197 const struct nf_hook_ops
*ops
;
199 if (table
->flags
& NFT_TABLE_F_DORMANT
||
200 !nft_is_base_chain(chain
))
203 basechain
= nft_base_chain(chain
);
204 ops
= &basechain
->ops
;
206 if (basechain
->type
->ops_register
)
207 return basechain
->type
->ops_register(net
, ops
);
209 if (nft_base_chain_netdev(table
->family
, basechain
->ops
.hooknum
))
210 return nft_netdev_register_hooks(net
, &basechain
->hook_list
);
212 return nf_register_net_hook(net
, &basechain
->ops
);
215 static void nf_tables_unregister_hook(struct net
*net
,
216 const struct nft_table
*table
,
217 struct nft_chain
*chain
)
219 struct nft_base_chain
*basechain
;
220 const struct nf_hook_ops
*ops
;
222 if (table
->flags
& NFT_TABLE_F_DORMANT
||
223 !nft_is_base_chain(chain
))
225 basechain
= nft_base_chain(chain
);
226 ops
= &basechain
->ops
;
228 if (basechain
->type
->ops_unregister
)
229 return basechain
->type
->ops_unregister(net
, ops
);
231 if (nft_base_chain_netdev(table
->family
, basechain
->ops
.hooknum
))
232 nft_netdev_unregister_hooks(net
, &basechain
->hook_list
);
234 nf_unregister_net_hook(net
, &basechain
->ops
);
237 static int nft_trans_table_add(struct nft_ctx
*ctx
, int msg_type
)
239 struct nft_trans
*trans
;
241 trans
= nft_trans_alloc(ctx
, msg_type
, sizeof(struct nft_trans_table
));
245 if (msg_type
== NFT_MSG_NEWTABLE
)
246 nft_activate_next(ctx
->net
, ctx
->table
);
248 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
252 static int nft_deltable(struct nft_ctx
*ctx
)
256 err
= nft_trans_table_add(ctx
, NFT_MSG_DELTABLE
);
260 nft_deactivate_next(ctx
->net
, ctx
->table
);
264 static struct nft_trans
*nft_trans_chain_add(struct nft_ctx
*ctx
, int msg_type
)
266 struct nft_trans
*trans
;
268 trans
= nft_trans_alloc(ctx
, msg_type
, sizeof(struct nft_trans_chain
));
270 return ERR_PTR(-ENOMEM
);
272 if (msg_type
== NFT_MSG_NEWCHAIN
) {
273 nft_activate_next(ctx
->net
, ctx
->chain
);
275 if (ctx
->nla
[NFTA_CHAIN_ID
]) {
276 nft_trans_chain_id(trans
) =
277 ntohl(nla_get_be32(ctx
->nla
[NFTA_CHAIN_ID
]));
281 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
285 static int nft_delchain(struct nft_ctx
*ctx
)
287 struct nft_trans
*trans
;
289 trans
= nft_trans_chain_add(ctx
, NFT_MSG_DELCHAIN
);
291 return PTR_ERR(trans
);
294 nft_deactivate_next(ctx
->net
, ctx
->chain
);
299 static void nft_rule_expr_activate(const struct nft_ctx
*ctx
,
300 struct nft_rule
*rule
)
302 struct nft_expr
*expr
;
304 expr
= nft_expr_first(rule
);
305 while (nft_expr_more(rule
, expr
)) {
306 if (expr
->ops
->activate
)
307 expr
->ops
->activate(ctx
, expr
);
309 expr
= nft_expr_next(expr
);
313 static void nft_rule_expr_deactivate(const struct nft_ctx
*ctx
,
314 struct nft_rule
*rule
,
315 enum nft_trans_phase phase
)
317 struct nft_expr
*expr
;
319 expr
= nft_expr_first(rule
);
320 while (nft_expr_more(rule
, expr
)) {
321 if (expr
->ops
->deactivate
)
322 expr
->ops
->deactivate(ctx
, expr
, phase
);
324 expr
= nft_expr_next(expr
);
329 nf_tables_delrule_deactivate(struct nft_ctx
*ctx
, struct nft_rule
*rule
)
331 /* You cannot delete the same rule twice */
332 if (nft_is_active_next(ctx
->net
, rule
)) {
333 nft_deactivate_next(ctx
->net
, rule
);
340 static struct nft_trans
*nft_trans_rule_add(struct nft_ctx
*ctx
, int msg_type
,
341 struct nft_rule
*rule
)
343 struct nft_trans
*trans
;
345 trans
= nft_trans_alloc(ctx
, msg_type
, sizeof(struct nft_trans_rule
));
349 if (msg_type
== NFT_MSG_NEWRULE
&& ctx
->nla
[NFTA_RULE_ID
] != NULL
) {
350 nft_trans_rule_id(trans
) =
351 ntohl(nla_get_be32(ctx
->nla
[NFTA_RULE_ID
]));
353 nft_trans_rule(trans
) = rule
;
354 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
359 static int nft_delrule(struct nft_ctx
*ctx
, struct nft_rule
*rule
)
361 struct nft_flow_rule
*flow
;
362 struct nft_trans
*trans
;
365 trans
= nft_trans_rule_add(ctx
, NFT_MSG_DELRULE
, rule
);
369 if (ctx
->chain
->flags
& NFT_CHAIN_HW_OFFLOAD
) {
370 flow
= nft_flow_rule_create(ctx
->net
, rule
);
372 nft_trans_destroy(trans
);
373 return PTR_ERR(flow
);
376 nft_trans_flow_rule(trans
) = flow
;
379 err
= nf_tables_delrule_deactivate(ctx
, rule
);
381 nft_trans_destroy(trans
);
384 nft_rule_expr_deactivate(ctx
, rule
, NFT_TRANS_PREPARE
);
389 static int nft_delrule_by_chain(struct nft_ctx
*ctx
)
391 struct nft_rule
*rule
;
394 list_for_each_entry(rule
, &ctx
->chain
->rules
, list
) {
395 if (!nft_is_active_next(ctx
->net
, rule
))
398 err
= nft_delrule(ctx
, rule
);
405 static int nft_trans_set_add(const struct nft_ctx
*ctx
, int msg_type
,
408 struct nft_trans
*trans
;
410 trans
= nft_trans_alloc(ctx
, msg_type
, sizeof(struct nft_trans_set
));
414 if (msg_type
== NFT_MSG_NEWSET
&& ctx
->nla
[NFTA_SET_ID
] != NULL
) {
415 nft_trans_set_id(trans
) =
416 ntohl(nla_get_be32(ctx
->nla
[NFTA_SET_ID
]));
417 nft_activate_next(ctx
->net
, set
);
419 nft_trans_set(trans
) = set
;
420 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
425 static int nft_delset(const struct nft_ctx
*ctx
, struct nft_set
*set
)
429 err
= nft_trans_set_add(ctx
, NFT_MSG_DELSET
, set
);
433 nft_deactivate_next(ctx
->net
, set
);
439 static int nft_trans_obj_add(struct nft_ctx
*ctx
, int msg_type
,
440 struct nft_object
*obj
)
442 struct nft_trans
*trans
;
444 trans
= nft_trans_alloc(ctx
, msg_type
, sizeof(struct nft_trans_obj
));
448 if (msg_type
== NFT_MSG_NEWOBJ
)
449 nft_activate_next(ctx
->net
, obj
);
451 nft_trans_obj(trans
) = obj
;
452 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
457 static int nft_delobj(struct nft_ctx
*ctx
, struct nft_object
*obj
)
461 err
= nft_trans_obj_add(ctx
, NFT_MSG_DELOBJ
, obj
);
465 nft_deactivate_next(ctx
->net
, obj
);
471 static int nft_trans_flowtable_add(struct nft_ctx
*ctx
, int msg_type
,
472 struct nft_flowtable
*flowtable
)
474 struct nft_trans
*trans
;
476 trans
= nft_trans_alloc(ctx
, msg_type
,
477 sizeof(struct nft_trans_flowtable
));
481 if (msg_type
== NFT_MSG_NEWFLOWTABLE
)
482 nft_activate_next(ctx
->net
, flowtable
);
484 nft_trans_flowtable(trans
) = flowtable
;
485 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
490 static int nft_delflowtable(struct nft_ctx
*ctx
,
491 struct nft_flowtable
*flowtable
)
495 err
= nft_trans_flowtable_add(ctx
, NFT_MSG_DELFLOWTABLE
, flowtable
);
499 nft_deactivate_next(ctx
->net
, flowtable
);
509 static struct nft_table
*nft_table_lookup(const struct net
*net
,
510 const struct nlattr
*nla
,
511 u8 family
, u8 genmask
, u32 nlpid
)
513 struct nft_table
*table
;
516 return ERR_PTR(-EINVAL
);
518 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
,
519 lockdep_is_held(&net
->nft
.commit_mutex
)) {
520 if (!nla_strcmp(nla
, table
->name
) &&
521 table
->family
== family
&&
522 nft_active_genmask(table
, genmask
)) {
523 if (nft_table_has_owner(table
) &&
524 table
->nlpid
!= nlpid
)
525 return ERR_PTR(-EPERM
);
531 return ERR_PTR(-ENOENT
);
534 static struct nft_table
*nft_table_lookup_byhandle(const struct net
*net
,
535 const struct nlattr
*nla
,
538 struct nft_table
*table
;
540 list_for_each_entry(table
, &net
->nft
.tables
, list
) {
541 if (be64_to_cpu(nla_get_be64(nla
)) == table
->handle
&&
542 nft_active_genmask(table
, genmask
))
546 return ERR_PTR(-ENOENT
);
549 static inline u64
nf_tables_alloc_handle(struct nft_table
*table
)
551 return ++table
->hgenerator
;
554 static const struct nft_chain_type
*chain_type
[NFPROTO_NUMPROTO
][NFT_CHAIN_T_MAX
];
556 static const struct nft_chain_type
*
557 __nft_chain_type_get(u8 family
, enum nft_chain_types type
)
559 if (family
>= NFPROTO_NUMPROTO
||
560 type
>= NFT_CHAIN_T_MAX
)
563 return chain_type
[family
][type
];
566 static const struct nft_chain_type
*
567 __nf_tables_chain_type_lookup(const struct nlattr
*nla
, u8 family
)
569 const struct nft_chain_type
*type
;
572 for (i
= 0; i
< NFT_CHAIN_T_MAX
; i
++) {
573 type
= __nft_chain_type_get(family
, i
);
576 if (!nla_strcmp(nla
, type
->name
))
582 struct nft_module_request
{
583 struct list_head list
;
584 char module
[MODULE_NAME_LEN
];
588 #ifdef CONFIG_MODULES
589 static __printf(2, 3) int nft_request_module(struct net
*net
, const char *fmt
,
592 char module_name
[MODULE_NAME_LEN
];
593 struct nft_module_request
*req
;
598 ret
= vsnprintf(module_name
, MODULE_NAME_LEN
, fmt
, args
);
600 if (ret
>= MODULE_NAME_LEN
)
603 list_for_each_entry(req
, &net
->nft
.module_list
, list
) {
604 if (!strcmp(req
->module
, module_name
)) {
608 /* A request to load this module already exists. */
613 req
= kmalloc(sizeof(*req
), GFP_KERNEL
);
618 strlcpy(req
->module
, module_name
, MODULE_NAME_LEN
);
619 list_add_tail(&req
->list
, &net
->nft
.module_list
);
625 static void lockdep_nfnl_nft_mutex_not_held(void)
627 #ifdef CONFIG_PROVE_LOCKING
629 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES
));
633 static const struct nft_chain_type
*
634 nf_tables_chain_type_lookup(struct net
*net
, const struct nlattr
*nla
,
635 u8 family
, bool autoload
)
637 const struct nft_chain_type
*type
;
639 type
= __nf_tables_chain_type_lookup(nla
, family
);
643 lockdep_nfnl_nft_mutex_not_held();
644 #ifdef CONFIG_MODULES
646 if (nft_request_module(net
, "nft-chain-%u-%.*s", family
,
648 (const char *)nla_data(nla
)) == -EAGAIN
)
649 return ERR_PTR(-EAGAIN
);
652 return ERR_PTR(-ENOENT
);
655 static const struct nla_policy nft_table_policy
[NFTA_TABLE_MAX
+ 1] = {
656 [NFTA_TABLE_NAME
] = { .type
= NLA_STRING
,
657 .len
= NFT_TABLE_MAXNAMELEN
- 1 },
658 [NFTA_TABLE_FLAGS
] = { .type
= NLA_U32
},
659 [NFTA_TABLE_HANDLE
] = { .type
= NLA_U64
},
660 [NFTA_TABLE_USERDATA
] = { .type
= NLA_BINARY
,
661 .len
= NFT_USERDATA_MAXLEN
}
664 static int nf_tables_fill_table_info(struct sk_buff
*skb
, struct net
*net
,
665 u32 portid
, u32 seq
, int event
, u32 flags
,
666 int family
, const struct nft_table
*table
)
668 struct nlmsghdr
*nlh
;
669 struct nfgenmsg
*nfmsg
;
671 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
672 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
), flags
);
674 goto nla_put_failure
;
676 nfmsg
= nlmsg_data(nlh
);
677 nfmsg
->nfgen_family
= family
;
678 nfmsg
->version
= NFNETLINK_V0
;
679 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
681 if (nla_put_string(skb
, NFTA_TABLE_NAME
, table
->name
) ||
682 nla_put_be32(skb
, NFTA_TABLE_FLAGS
, htonl(table
->flags
)) ||
683 nla_put_be32(skb
, NFTA_TABLE_USE
, htonl(table
->use
)) ||
684 nla_put_be64(skb
, NFTA_TABLE_HANDLE
, cpu_to_be64(table
->handle
),
686 goto nla_put_failure
;
687 if (nft_table_has_owner(table
) &&
688 nla_put_be32(skb
, NFTA_TABLE_OWNER
, htonl(table
->nlpid
)))
689 goto nla_put_failure
;
692 if (nla_put(skb
, NFTA_TABLE_USERDATA
, table
->udlen
, table
->udata
))
693 goto nla_put_failure
;
700 nlmsg_trim(skb
, nlh
);
704 struct nftnl_skb_parms
{
707 #define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
709 static void nft_notify_enqueue(struct sk_buff
*skb
, bool report
,
710 struct list_head
*notify_list
)
712 NFT_CB(skb
).report
= report
;
713 list_add_tail(&skb
->list
, notify_list
);
716 static void nf_tables_table_notify(const struct nft_ctx
*ctx
, int event
)
720 char *buf
= kasprintf(GFP_KERNEL
, "%s:%llu;?:0",
721 ctx
->table
->name
, ctx
->table
->handle
);
726 event
== NFT_MSG_NEWTABLE
?
727 AUDIT_NFT_OP_TABLE_REGISTER
:
728 AUDIT_NFT_OP_TABLE_UNREGISTER
,
733 !nfnetlink_has_listeners(ctx
->net
, NFNLGRP_NFTABLES
))
736 skb
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
740 err
= nf_tables_fill_table_info(skb
, ctx
->net
, ctx
->portid
, ctx
->seq
,
741 event
, 0, ctx
->family
, ctx
->table
);
747 nft_notify_enqueue(skb
, ctx
->report
, &ctx
->net
->nft
.notify_list
);
750 nfnetlink_set_err(ctx
->net
, ctx
->portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
753 static int nf_tables_dump_tables(struct sk_buff
*skb
,
754 struct netlink_callback
*cb
)
756 const struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
757 const struct nft_table
*table
;
758 unsigned int idx
= 0, s_idx
= cb
->args
[0];
759 struct net
*net
= sock_net(skb
->sk
);
760 int family
= nfmsg
->nfgen_family
;
763 cb
->seq
= net
->nft
.base_seq
;
765 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
766 if (family
!= NFPROTO_UNSPEC
&& family
!= table
->family
)
772 memset(&cb
->args
[1], 0,
773 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
774 if (!nft_is_active(net
, table
))
776 if (nf_tables_fill_table_info(skb
, net
,
777 NETLINK_CB(cb
->skb
).portid
,
779 NFT_MSG_NEWTABLE
, NLM_F_MULTI
,
780 table
->family
, table
) < 0)
783 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
793 static int nft_netlink_dump_start_rcu(struct sock
*nlsk
, struct sk_buff
*skb
,
794 const struct nlmsghdr
*nlh
,
795 struct netlink_dump_control
*c
)
799 if (!try_module_get(THIS_MODULE
))
803 err
= netlink_dump_start(nlsk
, skb
, nlh
, c
);
805 module_put(THIS_MODULE
);
810 /* called with rcu_read_lock held */
811 static int nf_tables_gettable(struct net
*net
, struct sock
*nlsk
,
812 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
813 const struct nlattr
* const nla
[],
814 struct netlink_ext_ack
*extack
)
816 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
817 u8 genmask
= nft_genmask_cur(net
);
818 const struct nft_table
*table
;
819 struct sk_buff
*skb2
;
820 int family
= nfmsg
->nfgen_family
;
823 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
824 struct netlink_dump_control c
= {
825 .dump
= nf_tables_dump_tables
,
826 .module
= THIS_MODULE
,
829 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
832 table
= nft_table_lookup(net
, nla
[NFTA_TABLE_NAME
], family
, genmask
, 0);
834 NL_SET_BAD_ATTR(extack
, nla
[NFTA_TABLE_NAME
]);
835 return PTR_ERR(table
);
838 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
842 err
= nf_tables_fill_table_info(skb2
, net
, NETLINK_CB(skb
).portid
,
843 nlh
->nlmsg_seq
, NFT_MSG_NEWTABLE
, 0,
846 goto err_fill_table_info
;
848 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
855 static void nft_table_disable(struct net
*net
, struct nft_table
*table
, u32 cnt
)
857 struct nft_chain
*chain
;
860 list_for_each_entry(chain
, &table
->chains
, list
) {
861 if (!nft_is_active_next(net
, chain
))
863 if (!nft_is_base_chain(chain
))
866 if (cnt
&& i
++ == cnt
)
869 nf_tables_unregister_hook(net
, table
, chain
);
873 static int nf_tables_table_enable(struct net
*net
, struct nft_table
*table
)
875 struct nft_chain
*chain
;
878 list_for_each_entry(chain
, &table
->chains
, list
) {
879 if (!nft_is_active_next(net
, chain
))
881 if (!nft_is_base_chain(chain
))
884 err
= nf_tables_register_hook(net
, table
, chain
);
886 goto err_register_hooks
;
894 nft_table_disable(net
, table
, i
);
898 static void nf_tables_table_disable(struct net
*net
, struct nft_table
*table
)
900 nft_table_disable(net
, table
, 0);
903 static int nf_tables_updtable(struct nft_ctx
*ctx
)
905 struct nft_trans
*trans
;
909 if (!ctx
->nla
[NFTA_TABLE_FLAGS
])
912 flags
= ntohl(nla_get_be32(ctx
->nla
[NFTA_TABLE_FLAGS
]));
913 if (flags
& ~NFT_TABLE_F_MASK
)
916 if (flags
== ctx
->table
->flags
)
919 if ((nft_table_has_owner(ctx
->table
) &&
920 !(flags
& NFT_TABLE_F_OWNER
)) ||
921 (!nft_table_has_owner(ctx
->table
) &&
922 flags
& NFT_TABLE_F_OWNER
))
925 trans
= nft_trans_alloc(ctx
, NFT_MSG_NEWTABLE
,
926 sizeof(struct nft_trans_table
));
930 if ((flags
& NFT_TABLE_F_DORMANT
) &&
931 !(ctx
->table
->flags
& NFT_TABLE_F_DORMANT
)) {
932 nft_trans_table_enable(trans
) = false;
933 } else if (!(flags
& NFT_TABLE_F_DORMANT
) &&
934 ctx
->table
->flags
& NFT_TABLE_F_DORMANT
) {
935 ctx
->table
->flags
&= ~NFT_TABLE_F_DORMANT
;
936 ret
= nf_tables_table_enable(ctx
->net
, ctx
->table
);
938 nft_trans_table_enable(trans
) = true;
940 ctx
->table
->flags
|= NFT_TABLE_F_DORMANT
;
945 nft_trans_table_update(trans
) = true;
946 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
949 nft_trans_destroy(trans
);
953 static u32
nft_chain_hash(const void *data
, u32 len
, u32 seed
)
955 const char *name
= data
;
957 return jhash(name
, strlen(name
), seed
);
960 static u32
nft_chain_hash_obj(const void *data
, u32 len
, u32 seed
)
962 const struct nft_chain
*chain
= data
;
964 return nft_chain_hash(chain
->name
, 0, seed
);
967 static int nft_chain_hash_cmp(struct rhashtable_compare_arg
*arg
,
970 const struct nft_chain
*chain
= ptr
;
971 const char *name
= arg
->key
;
973 return strcmp(chain
->name
, name
);
976 static u32
nft_objname_hash(const void *data
, u32 len
, u32 seed
)
978 const struct nft_object_hash_key
*k
= data
;
980 seed
^= hash_ptr(k
->table
, 32);
982 return jhash(k
->name
, strlen(k
->name
), seed
);
985 static u32
nft_objname_hash_obj(const void *data
, u32 len
, u32 seed
)
987 const struct nft_object
*obj
= data
;
989 return nft_objname_hash(&obj
->key
, 0, seed
);
992 static int nft_objname_hash_cmp(struct rhashtable_compare_arg
*arg
,
995 const struct nft_object_hash_key
*k
= arg
->key
;
996 const struct nft_object
*obj
= ptr
;
998 if (obj
->key
.table
!= k
->table
)
1001 return strcmp(obj
->key
.name
, k
->name
);
1004 static int nf_tables_newtable(struct net
*net
, struct sock
*nlsk
,
1005 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
1006 const struct nlattr
* const nla
[],
1007 struct netlink_ext_ack
*extack
)
1009 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1010 u8 genmask
= nft_genmask_next(net
);
1011 int family
= nfmsg
->nfgen_family
;
1012 const struct nlattr
*attr
;
1013 struct nft_table
*table
;
1018 lockdep_assert_held(&net
->nft
.commit_mutex
);
1019 attr
= nla
[NFTA_TABLE_NAME
];
1020 table
= nft_table_lookup(net
, attr
, family
, genmask
,
1021 NETLINK_CB(skb
).portid
);
1022 if (IS_ERR(table
)) {
1023 if (PTR_ERR(table
) != -ENOENT
)
1024 return PTR_ERR(table
);
1026 if (nlh
->nlmsg_flags
& NLM_F_EXCL
) {
1027 NL_SET_BAD_ATTR(extack
, attr
);
1030 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
1033 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
1034 return nf_tables_updtable(&ctx
);
1037 if (nla
[NFTA_TABLE_FLAGS
]) {
1038 flags
= ntohl(nla_get_be32(nla
[NFTA_TABLE_FLAGS
]));
1039 if (flags
& ~NFT_TABLE_F_MASK
)
1044 table
= kzalloc(sizeof(*table
), GFP_KERNEL
);
1048 table
->name
= nla_strdup(attr
, GFP_KERNEL
);
1049 if (table
->name
== NULL
)
1052 if (nla
[NFTA_TABLE_USERDATA
]) {
1053 table
->udata
= nla_memdup(nla
[NFTA_TABLE_USERDATA
], GFP_KERNEL
);
1054 if (table
->udata
== NULL
)
1055 goto err_table_udata
;
1057 table
->udlen
= nla_len(nla
[NFTA_TABLE_USERDATA
]);
1060 err
= rhltable_init(&table
->chains_ht
, &nft_chain_ht_params
);
1064 INIT_LIST_HEAD(&table
->chains
);
1065 INIT_LIST_HEAD(&table
->sets
);
1066 INIT_LIST_HEAD(&table
->objects
);
1067 INIT_LIST_HEAD(&table
->flowtables
);
1068 table
->family
= family
;
1069 table
->flags
= flags
;
1070 table
->handle
= ++table_handle
;
1071 if (table
->flags
& NFT_TABLE_F_OWNER
)
1072 table
->nlpid
= NETLINK_CB(skb
).portid
;
1074 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
1075 err
= nft_trans_table_add(&ctx
, NFT_MSG_NEWTABLE
);
1079 list_add_tail_rcu(&table
->list
, &net
->nft
.tables
);
1082 rhltable_destroy(&table
->chains_ht
);
1084 kfree(table
->udata
);
1093 static int nft_flush_table(struct nft_ctx
*ctx
)
1095 struct nft_flowtable
*flowtable
, *nft
;
1096 struct nft_chain
*chain
, *nc
;
1097 struct nft_object
*obj
, *ne
;
1098 struct nft_set
*set
, *ns
;
1101 list_for_each_entry(chain
, &ctx
->table
->chains
, list
) {
1102 if (!nft_is_active_next(ctx
->net
, chain
))
1105 if (nft_chain_is_bound(chain
))
1110 err
= nft_delrule_by_chain(ctx
);
1115 list_for_each_entry_safe(set
, ns
, &ctx
->table
->sets
, list
) {
1116 if (!nft_is_active_next(ctx
->net
, set
))
1119 if (nft_set_is_anonymous(set
) &&
1120 !list_empty(&set
->bindings
))
1123 err
= nft_delset(ctx
, set
);
1128 list_for_each_entry_safe(flowtable
, nft
, &ctx
->table
->flowtables
, list
) {
1129 if (!nft_is_active_next(ctx
->net
, flowtable
))
1132 err
= nft_delflowtable(ctx
, flowtable
);
1137 list_for_each_entry_safe(obj
, ne
, &ctx
->table
->objects
, list
) {
1138 if (!nft_is_active_next(ctx
->net
, obj
))
1141 err
= nft_delobj(ctx
, obj
);
1146 list_for_each_entry_safe(chain
, nc
, &ctx
->table
->chains
, list
) {
1147 if (!nft_is_active_next(ctx
->net
, chain
))
1150 if (nft_chain_is_bound(chain
))
1155 err
= nft_delchain(ctx
);
1160 err
= nft_deltable(ctx
);
1165 static int nft_flush(struct nft_ctx
*ctx
, int family
)
1167 struct nft_table
*table
, *nt
;
1168 const struct nlattr
* const *nla
= ctx
->nla
;
1171 list_for_each_entry_safe(table
, nt
, &ctx
->net
->nft
.tables
, list
) {
1172 if (family
!= AF_UNSPEC
&& table
->family
!= family
)
1175 ctx
->family
= table
->family
;
1177 if (!nft_is_active_next(ctx
->net
, table
))
1180 if (nft_table_has_owner(table
) && table
->nlpid
!= ctx
->portid
)
1183 if (nla
[NFTA_TABLE_NAME
] &&
1184 nla_strcmp(nla
[NFTA_TABLE_NAME
], table
->name
) != 0)
1189 err
= nft_flush_table(ctx
);
1197 static int nf_tables_deltable(struct net
*net
, struct sock
*nlsk
,
1198 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
1199 const struct nlattr
* const nla
[],
1200 struct netlink_ext_ack
*extack
)
1202 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1203 u8 genmask
= nft_genmask_next(net
);
1204 int family
= nfmsg
->nfgen_family
;
1205 const struct nlattr
*attr
;
1206 struct nft_table
*table
;
1209 nft_ctx_init(&ctx
, net
, skb
, nlh
, 0, NULL
, NULL
, nla
);
1210 if (family
== AF_UNSPEC
||
1211 (!nla
[NFTA_TABLE_NAME
] && !nla
[NFTA_TABLE_HANDLE
]))
1212 return nft_flush(&ctx
, family
);
1214 if (nla
[NFTA_TABLE_HANDLE
]) {
1215 attr
= nla
[NFTA_TABLE_HANDLE
];
1216 table
= nft_table_lookup_byhandle(net
, attr
, genmask
);
1218 attr
= nla
[NFTA_TABLE_NAME
];
1219 table
= nft_table_lookup(net
, attr
, family
, genmask
,
1220 NETLINK_CB(skb
).portid
);
1223 if (IS_ERR(table
)) {
1224 NL_SET_BAD_ATTR(extack
, attr
);
1225 return PTR_ERR(table
);
1228 if (nlh
->nlmsg_flags
& NLM_F_NONREC
&&
1232 ctx
.family
= family
;
1235 return nft_flush_table(&ctx
);
1238 static void nf_tables_table_destroy(struct nft_ctx
*ctx
)
1240 if (WARN_ON(ctx
->table
->use
> 0))
1243 rhltable_destroy(&ctx
->table
->chains_ht
);
1244 kfree(ctx
->table
->name
);
1245 kfree(ctx
->table
->udata
);
1249 void nft_register_chain_type(const struct nft_chain_type
*ctype
)
1251 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
1252 if (WARN_ON(__nft_chain_type_get(ctype
->family
, ctype
->type
))) {
1253 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
1256 chain_type
[ctype
->family
][ctype
->type
] = ctype
;
1257 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
1259 EXPORT_SYMBOL_GPL(nft_register_chain_type
);
1261 void nft_unregister_chain_type(const struct nft_chain_type
*ctype
)
1263 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
1264 chain_type
[ctype
->family
][ctype
->type
] = NULL
;
1265 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
1267 EXPORT_SYMBOL_GPL(nft_unregister_chain_type
);
1273 static struct nft_chain
*
1274 nft_chain_lookup_byhandle(const struct nft_table
*table
, u64 handle
, u8 genmask
)
1276 struct nft_chain
*chain
;
1278 list_for_each_entry(chain
, &table
->chains
, list
) {
1279 if (chain
->handle
== handle
&&
1280 nft_active_genmask(chain
, genmask
))
1284 return ERR_PTR(-ENOENT
);
1287 static bool lockdep_commit_lock_is_held(const struct net
*net
)
1289 #ifdef CONFIG_PROVE_LOCKING
1290 return lockdep_is_held(&net
->nft
.commit_mutex
);
1296 static struct nft_chain
*nft_chain_lookup(struct net
*net
,
1297 struct nft_table
*table
,
1298 const struct nlattr
*nla
, u8 genmask
)
1300 char search
[NFT_CHAIN_MAXNAMELEN
+ 1];
1301 struct rhlist_head
*tmp
, *list
;
1302 struct nft_chain
*chain
;
1305 return ERR_PTR(-EINVAL
);
1307 nla_strscpy(search
, nla
, sizeof(search
));
1309 WARN_ON(!rcu_read_lock_held() &&
1310 !lockdep_commit_lock_is_held(net
));
1312 chain
= ERR_PTR(-ENOENT
);
1314 list
= rhltable_lookup(&table
->chains_ht
, search
, nft_chain_ht_params
);
1318 rhl_for_each_entry_rcu(chain
, tmp
, list
, rhlhead
) {
1319 if (nft_active_genmask(chain
, genmask
))
1322 chain
= ERR_PTR(-ENOENT
);
1328 static const struct nla_policy nft_chain_policy
[NFTA_CHAIN_MAX
+ 1] = {
1329 [NFTA_CHAIN_TABLE
] = { .type
= NLA_STRING
,
1330 .len
= NFT_TABLE_MAXNAMELEN
- 1 },
1331 [NFTA_CHAIN_HANDLE
] = { .type
= NLA_U64
},
1332 [NFTA_CHAIN_NAME
] = { .type
= NLA_STRING
,
1333 .len
= NFT_CHAIN_MAXNAMELEN
- 1 },
1334 [NFTA_CHAIN_HOOK
] = { .type
= NLA_NESTED
},
1335 [NFTA_CHAIN_POLICY
] = { .type
= NLA_U32
},
1336 [NFTA_CHAIN_TYPE
] = { .type
= NLA_STRING
,
1337 .len
= NFT_MODULE_AUTOLOAD_LIMIT
},
1338 [NFTA_CHAIN_COUNTERS
] = { .type
= NLA_NESTED
},
1339 [NFTA_CHAIN_FLAGS
] = { .type
= NLA_U32
},
1340 [NFTA_CHAIN_ID
] = { .type
= NLA_U32
},
1341 [NFTA_CHAIN_USERDATA
] = { .type
= NLA_BINARY
,
1342 .len
= NFT_USERDATA_MAXLEN
},
1345 static const struct nla_policy nft_hook_policy
[NFTA_HOOK_MAX
+ 1] = {
1346 [NFTA_HOOK_HOOKNUM
] = { .type
= NLA_U32
},
1347 [NFTA_HOOK_PRIORITY
] = { .type
= NLA_U32
},
1348 [NFTA_HOOK_DEV
] = { .type
= NLA_STRING
,
1349 .len
= IFNAMSIZ
- 1 },
1352 static int nft_dump_stats(struct sk_buff
*skb
, struct nft_stats __percpu
*stats
)
1354 struct nft_stats
*cpu_stats
, total
;
1355 struct nlattr
*nest
;
1363 memset(&total
, 0, sizeof(total
));
1364 for_each_possible_cpu(cpu
) {
1365 cpu_stats
= per_cpu_ptr(stats
, cpu
);
1367 seq
= u64_stats_fetch_begin_irq(&cpu_stats
->syncp
);
1368 pkts
= cpu_stats
->pkts
;
1369 bytes
= cpu_stats
->bytes
;
1370 } while (u64_stats_fetch_retry_irq(&cpu_stats
->syncp
, seq
));
1372 total
.bytes
+= bytes
;
1374 nest
= nla_nest_start_noflag(skb
, NFTA_CHAIN_COUNTERS
);
1376 goto nla_put_failure
;
1378 if (nla_put_be64(skb
, NFTA_COUNTER_PACKETS
, cpu_to_be64(total
.pkts
),
1379 NFTA_COUNTER_PAD
) ||
1380 nla_put_be64(skb
, NFTA_COUNTER_BYTES
, cpu_to_be64(total
.bytes
),
1382 goto nla_put_failure
;
1384 nla_nest_end(skb
, nest
);
1391 static int nft_dump_basechain_hook(struct sk_buff
*skb
, int family
,
1392 const struct nft_base_chain
*basechain
)
1394 const struct nf_hook_ops
*ops
= &basechain
->ops
;
1395 struct nft_hook
*hook
, *first
= NULL
;
1396 struct nlattr
*nest
, *nest_devs
;
1399 nest
= nla_nest_start_noflag(skb
, NFTA_CHAIN_HOOK
);
1401 goto nla_put_failure
;
1402 if (nla_put_be32(skb
, NFTA_HOOK_HOOKNUM
, htonl(ops
->hooknum
)))
1403 goto nla_put_failure
;
1404 if (nla_put_be32(skb
, NFTA_HOOK_PRIORITY
, htonl(ops
->priority
)))
1405 goto nla_put_failure
;
1407 if (nft_base_chain_netdev(family
, ops
->hooknum
)) {
1408 nest_devs
= nla_nest_start_noflag(skb
, NFTA_HOOK_DEVS
);
1409 list_for_each_entry(hook
, &basechain
->hook_list
, list
) {
1413 if (nla_put_string(skb
, NFTA_DEVICE_NAME
,
1414 hook
->ops
.dev
->name
))
1415 goto nla_put_failure
;
1418 nla_nest_end(skb
, nest_devs
);
1421 nla_put_string(skb
, NFTA_HOOK_DEV
, first
->ops
.dev
->name
))
1422 goto nla_put_failure
;
1424 nla_nest_end(skb
, nest
);
1431 static int nf_tables_fill_chain_info(struct sk_buff
*skb
, struct net
*net
,
1432 u32 portid
, u32 seq
, int event
, u32 flags
,
1433 int family
, const struct nft_table
*table
,
1434 const struct nft_chain
*chain
)
1436 struct nlmsghdr
*nlh
;
1437 struct nfgenmsg
*nfmsg
;
1439 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
1440 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
), flags
);
1442 goto nla_put_failure
;
1444 nfmsg
= nlmsg_data(nlh
);
1445 nfmsg
->nfgen_family
= family
;
1446 nfmsg
->version
= NFNETLINK_V0
;
1447 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
1449 if (nla_put_string(skb
, NFTA_CHAIN_TABLE
, table
->name
))
1450 goto nla_put_failure
;
1451 if (nla_put_be64(skb
, NFTA_CHAIN_HANDLE
, cpu_to_be64(chain
->handle
),
1453 goto nla_put_failure
;
1454 if (nla_put_string(skb
, NFTA_CHAIN_NAME
, chain
->name
))
1455 goto nla_put_failure
;
1457 if (nft_is_base_chain(chain
)) {
1458 const struct nft_base_chain
*basechain
= nft_base_chain(chain
);
1459 struct nft_stats __percpu
*stats
;
1461 if (nft_dump_basechain_hook(skb
, family
, basechain
))
1462 goto nla_put_failure
;
1464 if (nla_put_be32(skb
, NFTA_CHAIN_POLICY
,
1465 htonl(basechain
->policy
)))
1466 goto nla_put_failure
;
1468 if (nla_put_string(skb
, NFTA_CHAIN_TYPE
, basechain
->type
->name
))
1469 goto nla_put_failure
;
1471 stats
= rcu_dereference_check(basechain
->stats
,
1472 lockdep_commit_lock_is_held(net
));
1473 if (nft_dump_stats(skb
, stats
))
1474 goto nla_put_failure
;
1478 nla_put_be32(skb
, NFTA_CHAIN_FLAGS
, htonl(chain
->flags
)))
1479 goto nla_put_failure
;
1481 if (nla_put_be32(skb
, NFTA_CHAIN_USE
, htonl(chain
->use
)))
1482 goto nla_put_failure
;
1485 nla_put(skb
, NFTA_CHAIN_USERDATA
, chain
->udlen
, chain
->udata
))
1486 goto nla_put_failure
;
1488 nlmsg_end(skb
, nlh
);
1492 nlmsg_trim(skb
, nlh
);
1496 static void nf_tables_chain_notify(const struct nft_ctx
*ctx
, int event
)
1498 struct sk_buff
*skb
;
1500 char *buf
= kasprintf(GFP_KERNEL
, "%s:%llu;%s:%llu",
1501 ctx
->table
->name
, ctx
->table
->handle
,
1502 ctx
->chain
->name
, ctx
->chain
->handle
);
1504 audit_log_nfcfg(buf
,
1507 event
== NFT_MSG_NEWCHAIN
?
1508 AUDIT_NFT_OP_CHAIN_REGISTER
:
1509 AUDIT_NFT_OP_CHAIN_UNREGISTER
,
1514 !nfnetlink_has_listeners(ctx
->net
, NFNLGRP_NFTABLES
))
1517 skb
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
1521 err
= nf_tables_fill_chain_info(skb
, ctx
->net
, ctx
->portid
, ctx
->seq
,
1522 event
, 0, ctx
->family
, ctx
->table
,
1529 nft_notify_enqueue(skb
, ctx
->report
, &ctx
->net
->nft
.notify_list
);
1532 nfnetlink_set_err(ctx
->net
, ctx
->portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
1535 static int nf_tables_dump_chains(struct sk_buff
*skb
,
1536 struct netlink_callback
*cb
)
1538 const struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
1539 const struct nft_table
*table
;
1540 const struct nft_chain
*chain
;
1541 unsigned int idx
= 0, s_idx
= cb
->args
[0];
1542 struct net
*net
= sock_net(skb
->sk
);
1543 int family
= nfmsg
->nfgen_family
;
1546 cb
->seq
= net
->nft
.base_seq
;
1548 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
1549 if (family
!= NFPROTO_UNSPEC
&& family
!= table
->family
)
1552 list_for_each_entry_rcu(chain
, &table
->chains
, list
) {
1556 memset(&cb
->args
[1], 0,
1557 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1558 if (!nft_is_active(net
, chain
))
1560 if (nf_tables_fill_chain_info(skb
, net
,
1561 NETLINK_CB(cb
->skb
).portid
,
1565 table
->family
, table
,
1569 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
1580 /* called with rcu_read_lock held */
1581 static int nf_tables_getchain(struct net
*net
, struct sock
*nlsk
,
1582 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
1583 const struct nlattr
* const nla
[],
1584 struct netlink_ext_ack
*extack
)
1586 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
1587 u8 genmask
= nft_genmask_cur(net
);
1588 const struct nft_chain
*chain
;
1589 struct nft_table
*table
;
1590 struct sk_buff
*skb2
;
1591 int family
= nfmsg
->nfgen_family
;
1594 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
1595 struct netlink_dump_control c
= {
1596 .dump
= nf_tables_dump_chains
,
1597 .module
= THIS_MODULE
,
1600 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
1603 table
= nft_table_lookup(net
, nla
[NFTA_CHAIN_TABLE
], family
, genmask
, 0);
1604 if (IS_ERR(table
)) {
1605 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_TABLE
]);
1606 return PTR_ERR(table
);
1609 chain
= nft_chain_lookup(net
, table
, nla
[NFTA_CHAIN_NAME
], genmask
);
1610 if (IS_ERR(chain
)) {
1611 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_NAME
]);
1612 return PTR_ERR(chain
);
1615 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
1619 err
= nf_tables_fill_chain_info(skb2
, net
, NETLINK_CB(skb
).portid
,
1620 nlh
->nlmsg_seq
, NFT_MSG_NEWCHAIN
, 0,
1621 family
, table
, chain
);
1623 goto err_fill_chain_info
;
1625 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
1627 err_fill_chain_info
:
1632 static const struct nla_policy nft_counter_policy
[NFTA_COUNTER_MAX
+ 1] = {
1633 [NFTA_COUNTER_PACKETS
] = { .type
= NLA_U64
},
1634 [NFTA_COUNTER_BYTES
] = { .type
= NLA_U64
},
1637 static struct nft_stats __percpu
*nft_stats_alloc(const struct nlattr
*attr
)
1639 struct nlattr
*tb
[NFTA_COUNTER_MAX
+1];
1640 struct nft_stats __percpu
*newstats
;
1641 struct nft_stats
*stats
;
1644 err
= nla_parse_nested_deprecated(tb
, NFTA_COUNTER_MAX
, attr
,
1645 nft_counter_policy
, NULL
);
1647 return ERR_PTR(err
);
1649 if (!tb
[NFTA_COUNTER_BYTES
] || !tb
[NFTA_COUNTER_PACKETS
])
1650 return ERR_PTR(-EINVAL
);
1652 newstats
= netdev_alloc_pcpu_stats(struct nft_stats
);
1653 if (newstats
== NULL
)
1654 return ERR_PTR(-ENOMEM
);
1656 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1657 * are not exposed to userspace.
1660 stats
= this_cpu_ptr(newstats
);
1661 stats
->bytes
= be64_to_cpu(nla_get_be64(tb
[NFTA_COUNTER_BYTES
]));
1662 stats
->pkts
= be64_to_cpu(nla_get_be64(tb
[NFTA_COUNTER_PACKETS
]));
1668 static void nft_chain_stats_replace(struct nft_trans
*trans
)
1670 struct nft_base_chain
*chain
= nft_base_chain(trans
->ctx
.chain
);
1672 if (!nft_trans_chain_stats(trans
))
1675 nft_trans_chain_stats(trans
) =
1676 rcu_replace_pointer(chain
->stats
, nft_trans_chain_stats(trans
),
1677 lockdep_commit_lock_is_held(trans
->ctx
.net
));
1679 if (!nft_trans_chain_stats(trans
))
1680 static_branch_inc(&nft_counters_enabled
);
1683 static void nf_tables_chain_free_chain_rules(struct nft_chain
*chain
)
1685 struct nft_rule
**g0
= rcu_dereference_raw(chain
->rules_gen_0
);
1686 struct nft_rule
**g1
= rcu_dereference_raw(chain
->rules_gen_1
);
1692 /* should be NULL either via abort or via successful commit */
1693 WARN_ON_ONCE(chain
->rules_next
);
1694 kvfree(chain
->rules_next
);
1697 void nf_tables_chain_destroy(struct nft_ctx
*ctx
)
1699 struct nft_chain
*chain
= ctx
->chain
;
1700 struct nft_hook
*hook
, *next
;
1702 if (WARN_ON(chain
->use
> 0))
1705 /* no concurrent access possible anymore */
1706 nf_tables_chain_free_chain_rules(chain
);
1708 if (nft_is_base_chain(chain
)) {
1709 struct nft_base_chain
*basechain
= nft_base_chain(chain
);
1711 if (nft_base_chain_netdev(ctx
->family
, basechain
->ops
.hooknum
)) {
1712 list_for_each_entry_safe(hook
, next
,
1713 &basechain
->hook_list
, list
) {
1714 list_del_rcu(&hook
->list
);
1715 kfree_rcu(hook
, rcu
);
1718 module_put(basechain
->type
->owner
);
1719 if (rcu_access_pointer(basechain
->stats
)) {
1720 static_branch_dec(&nft_counters_enabled
);
1721 free_percpu(rcu_dereference_raw(basechain
->stats
));
1724 kfree(chain
->udata
);
1728 kfree(chain
->udata
);
1733 static struct nft_hook
*nft_netdev_hook_alloc(struct net
*net
,
1734 const struct nlattr
*attr
)
1736 struct net_device
*dev
;
1737 char ifname
[IFNAMSIZ
];
1738 struct nft_hook
*hook
;
1741 hook
= kmalloc(sizeof(struct nft_hook
), GFP_KERNEL
);
1744 goto err_hook_alloc
;
1747 nla_strscpy(ifname
, attr
, IFNAMSIZ
);
1748 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
1749 * indirectly serializing all the other holders of the commit_mutex with
1752 dev
= __dev_get_by_name(net
, ifname
);
1757 hook
->ops
.dev
= dev
;
1758 hook
->inactive
= false;
1765 return ERR_PTR(err
);
1768 static struct nft_hook
*nft_hook_list_find(struct list_head
*hook_list
,
1769 const struct nft_hook
*this)
1771 struct nft_hook
*hook
;
1773 list_for_each_entry(hook
, hook_list
, list
) {
1774 if (this->ops
.dev
== hook
->ops
.dev
)
1781 static int nf_tables_parse_netdev_hooks(struct net
*net
,
1782 const struct nlattr
*attr
,
1783 struct list_head
*hook_list
)
1785 struct nft_hook
*hook
, *next
;
1786 const struct nlattr
*tmp
;
1787 int rem
, n
= 0, err
;
1789 nla_for_each_nested(tmp
, attr
, rem
) {
1790 if (nla_type(tmp
) != NFTA_DEVICE_NAME
) {
1795 hook
= nft_netdev_hook_alloc(net
, tmp
);
1797 err
= PTR_ERR(hook
);
1800 if (nft_hook_list_find(hook_list
, hook
)) {
1805 list_add_tail(&hook
->list
, hook_list
);
1808 if (n
== NFT_NETDEVICE_MAX
) {
1817 list_for_each_entry_safe(hook
, next
, hook_list
, list
) {
1818 list_del(&hook
->list
);
1824 struct nft_chain_hook
{
1827 const struct nft_chain_type
*type
;
1828 struct list_head list
;
1831 static int nft_chain_parse_netdev(struct net
*net
,
1832 struct nlattr
*tb
[],
1833 struct list_head
*hook_list
)
1835 struct nft_hook
*hook
;
1838 if (tb
[NFTA_HOOK_DEV
]) {
1839 hook
= nft_netdev_hook_alloc(net
, tb
[NFTA_HOOK_DEV
]);
1841 return PTR_ERR(hook
);
1843 list_add_tail(&hook
->list
, hook_list
);
1844 } else if (tb
[NFTA_HOOK_DEVS
]) {
1845 err
= nf_tables_parse_netdev_hooks(net
, tb
[NFTA_HOOK_DEVS
],
1850 if (list_empty(hook_list
))
1859 static int nft_chain_parse_hook(struct net
*net
,
1860 const struct nlattr
* const nla
[],
1861 struct nft_chain_hook
*hook
, u8 family
,
1864 struct nlattr
*ha
[NFTA_HOOK_MAX
+ 1];
1865 const struct nft_chain_type
*type
;
1868 lockdep_assert_held(&net
->nft
.commit_mutex
);
1869 lockdep_nfnl_nft_mutex_not_held();
1871 err
= nla_parse_nested_deprecated(ha
, NFTA_HOOK_MAX
,
1872 nla
[NFTA_CHAIN_HOOK
],
1873 nft_hook_policy
, NULL
);
1877 if (ha
[NFTA_HOOK_HOOKNUM
] == NULL
||
1878 ha
[NFTA_HOOK_PRIORITY
] == NULL
)
1881 hook
->num
= ntohl(nla_get_be32(ha
[NFTA_HOOK_HOOKNUM
]));
1882 hook
->priority
= ntohl(nla_get_be32(ha
[NFTA_HOOK_PRIORITY
]));
1884 type
= __nft_chain_type_get(family
, NFT_CHAIN_T_DEFAULT
);
1888 if (nla
[NFTA_CHAIN_TYPE
]) {
1889 type
= nf_tables_chain_type_lookup(net
, nla
[NFTA_CHAIN_TYPE
],
1892 return PTR_ERR(type
);
1894 if (hook
->num
>= NFT_MAX_HOOKS
|| !(type
->hook_mask
& (1 << hook
->num
)))
1897 if (type
->type
== NFT_CHAIN_T_NAT
&&
1898 hook
->priority
<= NF_IP_PRI_CONNTRACK
)
1901 if (!try_module_get(type
->owner
))
1906 INIT_LIST_HEAD(&hook
->list
);
1907 if (nft_base_chain_netdev(family
, hook
->num
)) {
1908 err
= nft_chain_parse_netdev(net
, ha
, &hook
->list
);
1910 module_put(type
->owner
);
1913 } else if (ha
[NFTA_HOOK_DEV
] || ha
[NFTA_HOOK_DEVS
]) {
1914 module_put(type
->owner
);
1921 static void nft_chain_release_hook(struct nft_chain_hook
*hook
)
1923 struct nft_hook
*h
, *next
;
1925 list_for_each_entry_safe(h
, next
, &hook
->list
, list
) {
1929 module_put(hook
->type
->owner
);
1932 struct nft_rules_old
{
1934 struct nft_rule
**start
;
1937 static struct nft_rule
**nf_tables_chain_alloc_rules(const struct nft_chain
*chain
,
1940 if (alloc
> INT_MAX
)
1943 alloc
+= 1; /* NULL, ends rules */
1944 if (sizeof(struct nft_rule
*) > INT_MAX
/ alloc
)
1947 alloc
*= sizeof(struct nft_rule
*);
1948 alloc
+= sizeof(struct nft_rules_old
);
1950 return kvmalloc(alloc
, GFP_KERNEL
);
1953 static void nft_basechain_hook_init(struct nf_hook_ops
*ops
, u8 family
,
1954 const struct nft_chain_hook
*hook
,
1955 struct nft_chain
*chain
)
1958 ops
->hooknum
= hook
->num
;
1959 ops
->priority
= hook
->priority
;
1961 ops
->hook
= hook
->type
->hooks
[ops
->hooknum
];
1964 static int nft_basechain_init(struct nft_base_chain
*basechain
, u8 family
,
1965 struct nft_chain_hook
*hook
, u32 flags
)
1967 struct nft_chain
*chain
;
1970 basechain
->type
= hook
->type
;
1971 INIT_LIST_HEAD(&basechain
->hook_list
);
1972 chain
= &basechain
->chain
;
1974 if (nft_base_chain_netdev(family
, hook
->num
)) {
1975 list_splice_init(&hook
->list
, &basechain
->hook_list
);
1976 list_for_each_entry(h
, &basechain
->hook_list
, list
)
1977 nft_basechain_hook_init(&h
->ops
, family
, hook
, chain
);
1979 basechain
->ops
.hooknum
= hook
->num
;
1980 basechain
->ops
.priority
= hook
->priority
;
1982 nft_basechain_hook_init(&basechain
->ops
, family
, hook
, chain
);
1985 chain
->flags
|= NFT_CHAIN_BASE
| flags
;
1986 basechain
->policy
= NF_ACCEPT
;
1987 if (chain
->flags
& NFT_CHAIN_HW_OFFLOAD
&&
1988 nft_chain_offload_priority(basechain
) < 0)
1991 flow_block_init(&basechain
->flow_block
);
1996 static int nft_chain_add(struct nft_table
*table
, struct nft_chain
*chain
)
2000 err
= rhltable_insert_key(&table
->chains_ht
, chain
->name
,
2001 &chain
->rhlhead
, nft_chain_ht_params
);
2005 list_add_tail_rcu(&chain
->list
, &table
->chains
);
2010 static u64 chain_id
;
2012 static int nf_tables_addchain(struct nft_ctx
*ctx
, u8 family
, u8 genmask
,
2013 u8 policy
, u32 flags
)
2015 const struct nlattr
* const *nla
= ctx
->nla
;
2016 struct nft_table
*table
= ctx
->table
;
2017 struct nft_base_chain
*basechain
;
2018 struct nft_stats __percpu
*stats
;
2019 struct net
*net
= ctx
->net
;
2020 char name
[NFT_NAME_MAXLEN
];
2021 struct nft_trans
*trans
;
2022 struct nft_chain
*chain
;
2023 struct nft_rule
**rules
;
2026 if (table
->use
== UINT_MAX
)
2029 if (nla
[NFTA_CHAIN_HOOK
]) {
2030 struct nft_chain_hook hook
;
2032 if (flags
& NFT_CHAIN_BINDING
)
2035 err
= nft_chain_parse_hook(net
, nla
, &hook
, family
, true);
2039 basechain
= kzalloc(sizeof(*basechain
), GFP_KERNEL
);
2040 if (basechain
== NULL
) {
2041 nft_chain_release_hook(&hook
);
2044 chain
= &basechain
->chain
;
2046 if (nla
[NFTA_CHAIN_COUNTERS
]) {
2047 stats
= nft_stats_alloc(nla
[NFTA_CHAIN_COUNTERS
]);
2048 if (IS_ERR(stats
)) {
2049 nft_chain_release_hook(&hook
);
2051 return PTR_ERR(stats
);
2053 rcu_assign_pointer(basechain
->stats
, stats
);
2054 static_branch_inc(&nft_counters_enabled
);
2057 err
= nft_basechain_init(basechain
, family
, &hook
, flags
);
2059 nft_chain_release_hook(&hook
);
2064 if (flags
& NFT_CHAIN_BASE
)
2066 if (flags
& NFT_CHAIN_HW_OFFLOAD
)
2069 chain
= kzalloc(sizeof(*chain
), GFP_KERNEL
);
2073 chain
->flags
= flags
;
2077 INIT_LIST_HEAD(&chain
->rules
);
2078 chain
->handle
= nf_tables_alloc_handle(table
);
2079 chain
->table
= table
;
2081 if (nla
[NFTA_CHAIN_NAME
]) {
2082 chain
->name
= nla_strdup(nla
[NFTA_CHAIN_NAME
], GFP_KERNEL
);
2084 if (!(flags
& NFT_CHAIN_BINDING
)) {
2086 goto err_destroy_chain
;
2089 snprintf(name
, sizeof(name
), "__chain%llu", ++chain_id
);
2090 chain
->name
= kstrdup(name
, GFP_KERNEL
);
2095 goto err_destroy_chain
;
2098 if (nla
[NFTA_CHAIN_USERDATA
]) {
2099 chain
->udata
= nla_memdup(nla
[NFTA_CHAIN_USERDATA
], GFP_KERNEL
);
2100 if (chain
->udata
== NULL
) {
2102 goto err_destroy_chain
;
2104 chain
->udlen
= nla_len(nla
[NFTA_CHAIN_USERDATA
]);
2107 rules
= nf_tables_chain_alloc_rules(chain
, 0);
2110 goto err_destroy_chain
;
2114 rcu_assign_pointer(chain
->rules_gen_0
, rules
);
2115 rcu_assign_pointer(chain
->rules_gen_1
, rules
);
2117 err
= nf_tables_register_hook(net
, table
, chain
);
2119 goto err_destroy_chain
;
2121 trans
= nft_trans_chain_add(ctx
, NFT_MSG_NEWCHAIN
);
2122 if (IS_ERR(trans
)) {
2123 err
= PTR_ERR(trans
);
2124 goto err_unregister_hook
;
2127 nft_trans_chain_policy(trans
) = NFT_CHAIN_POLICY_UNSET
;
2128 if (nft_is_base_chain(chain
))
2129 nft_trans_chain_policy(trans
) = policy
;
2131 err
= nft_chain_add(table
, chain
);
2133 nft_trans_destroy(trans
);
2134 goto err_unregister_hook
;
2140 err_unregister_hook
:
2141 nf_tables_unregister_hook(net
, table
, chain
);
2143 nf_tables_chain_destroy(ctx
);
2148 static bool nft_hook_list_equal(struct list_head
*hook_list1
,
2149 struct list_head
*hook_list2
)
2151 struct nft_hook
*hook
;
2155 list_for_each_entry(hook
, hook_list2
, list
) {
2156 if (!nft_hook_list_find(hook_list1
, hook
))
2161 list_for_each_entry(hook
, hook_list1
, list
)
2167 static int nf_tables_updchain(struct nft_ctx
*ctx
, u8 genmask
, u8 policy
,
2168 u32 flags
, const struct nlattr
*attr
,
2169 struct netlink_ext_ack
*extack
)
2171 const struct nlattr
* const *nla
= ctx
->nla
;
2172 struct nft_table
*table
= ctx
->table
;
2173 struct nft_chain
*chain
= ctx
->chain
;
2174 struct nft_base_chain
*basechain
;
2175 struct nft_stats
*stats
= NULL
;
2176 struct nft_chain_hook hook
;
2177 struct nf_hook_ops
*ops
;
2178 struct nft_trans
*trans
;
2181 if (chain
->flags
^ flags
)
2184 if (nla
[NFTA_CHAIN_HOOK
]) {
2185 if (!nft_is_base_chain(chain
)) {
2186 NL_SET_BAD_ATTR(extack
, attr
);
2189 err
= nft_chain_parse_hook(ctx
->net
, nla
, &hook
, ctx
->family
,
2194 basechain
= nft_base_chain(chain
);
2195 if (basechain
->type
!= hook
.type
) {
2196 nft_chain_release_hook(&hook
);
2197 NL_SET_BAD_ATTR(extack
, attr
);
2201 if (nft_base_chain_netdev(ctx
->family
, hook
.num
)) {
2202 if (!nft_hook_list_equal(&basechain
->hook_list
,
2204 nft_chain_release_hook(&hook
);
2205 NL_SET_BAD_ATTR(extack
, attr
);
2209 ops
= &basechain
->ops
;
2210 if (ops
->hooknum
!= hook
.num
||
2211 ops
->priority
!= hook
.priority
) {
2212 nft_chain_release_hook(&hook
);
2213 NL_SET_BAD_ATTR(extack
, attr
);
2217 nft_chain_release_hook(&hook
);
2220 if (nla
[NFTA_CHAIN_HANDLE
] &&
2221 nla
[NFTA_CHAIN_NAME
]) {
2222 struct nft_chain
*chain2
;
2224 chain2
= nft_chain_lookup(ctx
->net
, table
,
2225 nla
[NFTA_CHAIN_NAME
], genmask
);
2226 if (!IS_ERR(chain2
)) {
2227 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_NAME
]);
2232 if (nla
[NFTA_CHAIN_COUNTERS
]) {
2233 if (!nft_is_base_chain(chain
))
2236 stats
= nft_stats_alloc(nla
[NFTA_CHAIN_COUNTERS
]);
2238 return PTR_ERR(stats
);
2242 trans
= nft_trans_alloc(ctx
, NFT_MSG_NEWCHAIN
,
2243 sizeof(struct nft_trans_chain
));
2247 nft_trans_chain_stats(trans
) = stats
;
2248 nft_trans_chain_update(trans
) = true;
2250 if (nla
[NFTA_CHAIN_POLICY
])
2251 nft_trans_chain_policy(trans
) = policy
;
2253 nft_trans_chain_policy(trans
) = -1;
2255 if (nla
[NFTA_CHAIN_HANDLE
] &&
2256 nla
[NFTA_CHAIN_NAME
]) {
2257 struct nft_trans
*tmp
;
2261 name
= nla_strdup(nla
[NFTA_CHAIN_NAME
], GFP_KERNEL
);
2266 list_for_each_entry(tmp
, &ctx
->net
->nft
.commit_list
, list
) {
2267 if (tmp
->msg_type
== NFT_MSG_NEWCHAIN
&&
2268 tmp
->ctx
.table
== table
&&
2269 nft_trans_chain_update(tmp
) &&
2270 nft_trans_chain_name(tmp
) &&
2271 strcmp(name
, nft_trans_chain_name(tmp
)) == 0) {
2272 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_NAME
]);
2278 nft_trans_chain_name(trans
) = name
;
2280 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
2289 static struct nft_chain
*nft_chain_lookup_byid(const struct net
*net
,
2290 const struct nlattr
*nla
)
2292 u32 id
= ntohl(nla_get_be32(nla
));
2293 struct nft_trans
*trans
;
2295 list_for_each_entry(trans
, &net
->nft
.commit_list
, list
) {
2296 struct nft_chain
*chain
= trans
->ctx
.chain
;
2298 if (trans
->msg_type
== NFT_MSG_NEWCHAIN
&&
2299 id
== nft_trans_chain_id(trans
))
2302 return ERR_PTR(-ENOENT
);
2305 static int nf_tables_newchain(struct net
*net
, struct sock
*nlsk
,
2306 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
2307 const struct nlattr
* const nla
[],
2308 struct netlink_ext_ack
*extack
)
2310 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2311 u8 genmask
= nft_genmask_next(net
);
2312 int family
= nfmsg
->nfgen_family
;
2313 struct nft_chain
*chain
= NULL
;
2314 const struct nlattr
*attr
;
2315 struct nft_table
*table
;
2316 u8 policy
= NF_ACCEPT
;
2321 lockdep_assert_held(&net
->nft
.commit_mutex
);
2323 table
= nft_table_lookup(net
, nla
[NFTA_CHAIN_TABLE
], family
, genmask
,
2324 NETLINK_CB(skb
).portid
);
2325 if (IS_ERR(table
)) {
2326 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_TABLE
]);
2327 return PTR_ERR(table
);
2331 attr
= nla
[NFTA_CHAIN_NAME
];
2333 if (nla
[NFTA_CHAIN_HANDLE
]) {
2334 handle
= be64_to_cpu(nla_get_be64(nla
[NFTA_CHAIN_HANDLE
]));
2335 chain
= nft_chain_lookup_byhandle(table
, handle
, genmask
);
2336 if (IS_ERR(chain
)) {
2337 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_HANDLE
]);
2338 return PTR_ERR(chain
);
2340 attr
= nla
[NFTA_CHAIN_HANDLE
];
2341 } else if (nla
[NFTA_CHAIN_NAME
]) {
2342 chain
= nft_chain_lookup(net
, table
, attr
, genmask
);
2343 if (IS_ERR(chain
)) {
2344 if (PTR_ERR(chain
) != -ENOENT
) {
2345 NL_SET_BAD_ATTR(extack
, attr
);
2346 return PTR_ERR(chain
);
2350 } else if (!nla
[NFTA_CHAIN_ID
]) {
2354 if (nla
[NFTA_CHAIN_POLICY
]) {
2355 if (chain
!= NULL
&&
2356 !nft_is_base_chain(chain
)) {
2357 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_POLICY
]);
2361 if (chain
== NULL
&&
2362 nla
[NFTA_CHAIN_HOOK
] == NULL
) {
2363 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_POLICY
]);
2367 policy
= ntohl(nla_get_be32(nla
[NFTA_CHAIN_POLICY
]));
2377 if (nla
[NFTA_CHAIN_FLAGS
])
2378 flags
= ntohl(nla_get_be32(nla
[NFTA_CHAIN_FLAGS
]));
2380 flags
= chain
->flags
;
2382 if (flags
& ~NFT_CHAIN_FLAGS
)
2385 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, chain
, nla
);
2387 if (chain
!= NULL
) {
2388 if (nlh
->nlmsg_flags
& NLM_F_EXCL
) {
2389 NL_SET_BAD_ATTR(extack
, attr
);
2392 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
2395 flags
|= chain
->flags
& NFT_CHAIN_BASE
;
2396 return nf_tables_updchain(&ctx
, genmask
, policy
, flags
, attr
,
2400 return nf_tables_addchain(&ctx
, family
, genmask
, policy
, flags
);
2403 static int nf_tables_delchain(struct net
*net
, struct sock
*nlsk
,
2404 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
2405 const struct nlattr
* const nla
[],
2406 struct netlink_ext_ack
*extack
)
2408 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
2409 u8 genmask
= nft_genmask_next(net
);
2410 int family
= nfmsg
->nfgen_family
;
2411 const struct nlattr
*attr
;
2412 struct nft_table
*table
;
2413 struct nft_chain
*chain
;
2414 struct nft_rule
*rule
;
2420 table
= nft_table_lookup(net
, nla
[NFTA_CHAIN_TABLE
], family
, genmask
,
2421 NETLINK_CB(skb
).portid
);
2422 if (IS_ERR(table
)) {
2423 NL_SET_BAD_ATTR(extack
, nla
[NFTA_CHAIN_TABLE
]);
2424 return PTR_ERR(table
);
2427 if (nla
[NFTA_CHAIN_HANDLE
]) {
2428 attr
= nla
[NFTA_CHAIN_HANDLE
];
2429 handle
= be64_to_cpu(nla_get_be64(attr
));
2430 chain
= nft_chain_lookup_byhandle(table
, handle
, genmask
);
2432 attr
= nla
[NFTA_CHAIN_NAME
];
2433 chain
= nft_chain_lookup(net
, table
, attr
, genmask
);
2435 if (IS_ERR(chain
)) {
2436 NL_SET_BAD_ATTR(extack
, attr
);
2437 return PTR_ERR(chain
);
2440 if (nlh
->nlmsg_flags
& NLM_F_NONREC
&&
2444 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, chain
, nla
);
2447 list_for_each_entry(rule
, &chain
->rules
, list
) {
2448 if (!nft_is_active_next(net
, rule
))
2452 err
= nft_delrule(&ctx
, rule
);
2457 /* There are rules and elements that are still holding references to us,
2458 * we cannot do a recursive removal in this case.
2461 NL_SET_BAD_ATTR(extack
, attr
);
2465 return nft_delchain(&ctx
);
2473 * nft_register_expr - register nf_tables expr type
2476 * Registers the expr type for use with nf_tables. Returns zero on
2477 * success or a negative errno code otherwise.
2479 int nft_register_expr(struct nft_expr_type
*type
)
2481 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
2482 if (type
->family
== NFPROTO_UNSPEC
)
2483 list_add_tail_rcu(&type
->list
, &nf_tables_expressions
);
2485 list_add_rcu(&type
->list
, &nf_tables_expressions
);
2486 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
2489 EXPORT_SYMBOL_GPL(nft_register_expr
);
2492 * nft_unregister_expr - unregister nf_tables expr type
2495 * Unregisters the expr typefor use with nf_tables.
2497 void nft_unregister_expr(struct nft_expr_type
*type
)
2499 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
2500 list_del_rcu(&type
->list
);
2501 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
2503 EXPORT_SYMBOL_GPL(nft_unregister_expr
);
2505 static const struct nft_expr_type
*__nft_expr_type_get(u8 family
,
2508 const struct nft_expr_type
*type
, *candidate
= NULL
;
2510 list_for_each_entry(type
, &nf_tables_expressions
, list
) {
2511 if (!nla_strcmp(nla
, type
->name
)) {
2512 if (!type
->family
&& !candidate
)
2514 else if (type
->family
== family
)
2521 #ifdef CONFIG_MODULES
2522 static int nft_expr_type_request_module(struct net
*net
, u8 family
,
2525 if (nft_request_module(net
, "nft-expr-%u-%.*s", family
,
2526 nla_len(nla
), (char *)nla_data(nla
)) == -EAGAIN
)
2533 static const struct nft_expr_type
*nft_expr_type_get(struct net
*net
,
2537 const struct nft_expr_type
*type
;
2540 return ERR_PTR(-EINVAL
);
2542 type
= __nft_expr_type_get(family
, nla
);
2543 if (type
!= NULL
&& try_module_get(type
->owner
))
2546 lockdep_nfnl_nft_mutex_not_held();
2547 #ifdef CONFIG_MODULES
2549 if (nft_expr_type_request_module(net
, family
, nla
) == -EAGAIN
)
2550 return ERR_PTR(-EAGAIN
);
2552 if (nft_request_module(net
, "nft-expr-%.*s",
2554 (char *)nla_data(nla
)) == -EAGAIN
)
2555 return ERR_PTR(-EAGAIN
);
2558 return ERR_PTR(-ENOENT
);
2561 static const struct nla_policy nft_expr_policy
[NFTA_EXPR_MAX
+ 1] = {
2562 [NFTA_EXPR_NAME
] = { .type
= NLA_STRING
,
2563 .len
= NFT_MODULE_AUTOLOAD_LIMIT
},
2564 [NFTA_EXPR_DATA
] = { .type
= NLA_NESTED
},
2567 static int nf_tables_fill_expr_info(struct sk_buff
*skb
,
2568 const struct nft_expr
*expr
)
2570 if (nla_put_string(skb
, NFTA_EXPR_NAME
, expr
->ops
->type
->name
))
2571 goto nla_put_failure
;
2573 if (expr
->ops
->dump
) {
2574 struct nlattr
*data
= nla_nest_start_noflag(skb
,
2577 goto nla_put_failure
;
2578 if (expr
->ops
->dump(skb
, expr
) < 0)
2579 goto nla_put_failure
;
2580 nla_nest_end(skb
, data
);
2589 int nft_expr_dump(struct sk_buff
*skb
, unsigned int attr
,
2590 const struct nft_expr
*expr
)
2592 struct nlattr
*nest
;
2594 nest
= nla_nest_start_noflag(skb
, attr
);
2596 goto nla_put_failure
;
2597 if (nf_tables_fill_expr_info(skb
, expr
) < 0)
2598 goto nla_put_failure
;
2599 nla_nest_end(skb
, nest
);
2606 struct nft_expr_info
{
2607 const struct nft_expr_ops
*ops
;
2608 const struct nlattr
*attr
;
2609 struct nlattr
*tb
[NFT_EXPR_MAXATTR
+ 1];
2612 static int nf_tables_expr_parse(const struct nft_ctx
*ctx
,
2613 const struct nlattr
*nla
,
2614 struct nft_expr_info
*info
)
2616 const struct nft_expr_type
*type
;
2617 const struct nft_expr_ops
*ops
;
2618 struct nlattr
*tb
[NFTA_EXPR_MAX
+ 1];
2621 err
= nla_parse_nested_deprecated(tb
, NFTA_EXPR_MAX
, nla
,
2622 nft_expr_policy
, NULL
);
2626 type
= nft_expr_type_get(ctx
->net
, ctx
->family
, tb
[NFTA_EXPR_NAME
]);
2628 return PTR_ERR(type
);
2630 if (tb
[NFTA_EXPR_DATA
]) {
2631 err
= nla_parse_nested_deprecated(info
->tb
, type
->maxattr
,
2633 type
->policy
, NULL
);
2637 memset(info
->tb
, 0, sizeof(info
->tb
[0]) * (type
->maxattr
+ 1));
2639 if (type
->select_ops
!= NULL
) {
2640 ops
= type
->select_ops(ctx
,
2641 (const struct nlattr
* const *)info
->tb
);
2644 #ifdef CONFIG_MODULES
2646 if (nft_expr_type_request_module(ctx
->net
,
2648 tb
[NFTA_EXPR_NAME
]) != -EAGAIN
)
2662 module_put(type
->owner
);
2666 static int nf_tables_newexpr(const struct nft_ctx
*ctx
,
2667 const struct nft_expr_info
*info
,
2668 struct nft_expr
*expr
)
2670 const struct nft_expr_ops
*ops
= info
->ops
;
2675 err
= ops
->init(ctx
, expr
, (const struct nlattr
**)info
->tb
);
2686 static void nf_tables_expr_destroy(const struct nft_ctx
*ctx
,
2687 struct nft_expr
*expr
)
2689 const struct nft_expr_type
*type
= expr
->ops
->type
;
2691 if (expr
->ops
->destroy
)
2692 expr
->ops
->destroy(ctx
, expr
);
2693 module_put(type
->owner
);
2696 static struct nft_expr
*nft_expr_init(const struct nft_ctx
*ctx
,
2697 const struct nlattr
*nla
)
2699 struct nft_expr_info info
;
2700 struct nft_expr
*expr
;
2701 struct module
*owner
;
2704 err
= nf_tables_expr_parse(ctx
, nla
, &info
);
2709 expr
= kzalloc(info
.ops
->size
, GFP_KERNEL
);
2713 err
= nf_tables_newexpr(ctx
, &info
, expr
);
2721 owner
= info
.ops
->type
->owner
;
2722 if (info
.ops
->type
->release_ops
)
2723 info
.ops
->type
->release_ops(info
.ops
);
2727 return ERR_PTR(err
);
2730 int nft_expr_clone(struct nft_expr
*dst
, struct nft_expr
*src
)
2734 if (src
->ops
->clone
) {
2735 dst
->ops
= src
->ops
;
2736 err
= src
->ops
->clone(dst
, src
);
2740 memcpy(dst
, src
, src
->ops
->size
);
2743 __module_get(src
->ops
->type
->owner
);
2748 void nft_expr_destroy(const struct nft_ctx
*ctx
, struct nft_expr
*expr
)
2750 nf_tables_expr_destroy(ctx
, expr
);
2758 static struct nft_rule
*__nft_rule_lookup(const struct nft_chain
*chain
,
2761 struct nft_rule
*rule
;
2763 // FIXME: this sucks
2764 list_for_each_entry_rcu(rule
, &chain
->rules
, list
) {
2765 if (handle
== rule
->handle
)
2769 return ERR_PTR(-ENOENT
);
2772 static struct nft_rule
*nft_rule_lookup(const struct nft_chain
*chain
,
2773 const struct nlattr
*nla
)
2776 return ERR_PTR(-EINVAL
);
2778 return __nft_rule_lookup(chain
, be64_to_cpu(nla_get_be64(nla
)));
2781 static const struct nla_policy nft_rule_policy
[NFTA_RULE_MAX
+ 1] = {
2782 [NFTA_RULE_TABLE
] = { .type
= NLA_STRING
,
2783 .len
= NFT_TABLE_MAXNAMELEN
- 1 },
2784 [NFTA_RULE_CHAIN
] = { .type
= NLA_STRING
,
2785 .len
= NFT_CHAIN_MAXNAMELEN
- 1 },
2786 [NFTA_RULE_HANDLE
] = { .type
= NLA_U64
},
2787 [NFTA_RULE_EXPRESSIONS
] = { .type
= NLA_NESTED
},
2788 [NFTA_RULE_COMPAT
] = { .type
= NLA_NESTED
},
2789 [NFTA_RULE_POSITION
] = { .type
= NLA_U64
},
2790 [NFTA_RULE_USERDATA
] = { .type
= NLA_BINARY
,
2791 .len
= NFT_USERDATA_MAXLEN
},
2792 [NFTA_RULE_ID
] = { .type
= NLA_U32
},
2793 [NFTA_RULE_POSITION_ID
] = { .type
= NLA_U32
},
2794 [NFTA_RULE_CHAIN_ID
] = { .type
= NLA_U32
},
2797 static int nf_tables_fill_rule_info(struct sk_buff
*skb
, struct net
*net
,
2798 u32 portid
, u32 seq
, int event
,
2799 u32 flags
, int family
,
2800 const struct nft_table
*table
,
2801 const struct nft_chain
*chain
,
2802 const struct nft_rule
*rule
,
2803 const struct nft_rule
*prule
)
2805 struct nlmsghdr
*nlh
;
2806 struct nfgenmsg
*nfmsg
;
2807 const struct nft_expr
*expr
, *next
;
2808 struct nlattr
*list
;
2809 u16 type
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
2811 nlh
= nlmsg_put(skb
, portid
, seq
, type
, sizeof(struct nfgenmsg
), flags
);
2813 goto nla_put_failure
;
2815 nfmsg
= nlmsg_data(nlh
);
2816 nfmsg
->nfgen_family
= family
;
2817 nfmsg
->version
= NFNETLINK_V0
;
2818 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
2820 if (nla_put_string(skb
, NFTA_RULE_TABLE
, table
->name
))
2821 goto nla_put_failure
;
2822 if (nla_put_string(skb
, NFTA_RULE_CHAIN
, chain
->name
))
2823 goto nla_put_failure
;
2824 if (nla_put_be64(skb
, NFTA_RULE_HANDLE
, cpu_to_be64(rule
->handle
),
2826 goto nla_put_failure
;
2828 if (event
!= NFT_MSG_DELRULE
&& prule
) {
2829 if (nla_put_be64(skb
, NFTA_RULE_POSITION
,
2830 cpu_to_be64(prule
->handle
),
2832 goto nla_put_failure
;
2835 list
= nla_nest_start_noflag(skb
, NFTA_RULE_EXPRESSIONS
);
2837 goto nla_put_failure
;
2838 nft_rule_for_each_expr(expr
, next
, rule
) {
2839 if (nft_expr_dump(skb
, NFTA_LIST_ELEM
, expr
) < 0)
2840 goto nla_put_failure
;
2842 nla_nest_end(skb
, list
);
2845 struct nft_userdata
*udata
= nft_userdata(rule
);
2846 if (nla_put(skb
, NFTA_RULE_USERDATA
, udata
->len
+ 1,
2848 goto nla_put_failure
;
2851 nlmsg_end(skb
, nlh
);
2855 nlmsg_trim(skb
, nlh
);
2859 static void nf_tables_rule_notify(const struct nft_ctx
*ctx
,
2860 const struct nft_rule
*rule
, int event
)
2862 struct sk_buff
*skb
;
2864 char *buf
= kasprintf(GFP_KERNEL
, "%s:%llu;%s:%llu",
2865 ctx
->table
->name
, ctx
->table
->handle
,
2866 ctx
->chain
->name
, ctx
->chain
->handle
);
2868 audit_log_nfcfg(buf
,
2871 event
== NFT_MSG_NEWRULE
?
2872 AUDIT_NFT_OP_RULE_REGISTER
:
2873 AUDIT_NFT_OP_RULE_UNREGISTER
,
2878 !nfnetlink_has_listeners(ctx
->net
, NFNLGRP_NFTABLES
))
2881 skb
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
2885 err
= nf_tables_fill_rule_info(skb
, ctx
->net
, ctx
->portid
, ctx
->seq
,
2886 event
, 0, ctx
->family
, ctx
->table
,
2887 ctx
->chain
, rule
, NULL
);
2893 nft_notify_enqueue(skb
, ctx
->report
, &ctx
->net
->nft
.notify_list
);
2896 nfnetlink_set_err(ctx
->net
, ctx
->portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
2899 struct nft_rule_dump_ctx
{
2904 static int __nf_tables_dump_rules(struct sk_buff
*skb
,
2906 struct netlink_callback
*cb
,
2907 const struct nft_table
*table
,
2908 const struct nft_chain
*chain
)
2910 struct net
*net
= sock_net(skb
->sk
);
2911 const struct nft_rule
*rule
, *prule
;
2912 unsigned int s_idx
= cb
->args
[0];
2915 list_for_each_entry_rcu(rule
, &chain
->rules
, list
) {
2916 if (!nft_is_active(net
, rule
))
2921 memset(&cb
->args
[1], 0,
2922 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
2924 if (nf_tables_fill_rule_info(skb
, net
, NETLINK_CB(cb
->skb
).portid
,
2927 NLM_F_MULTI
| NLM_F_APPEND
,
2929 table
, chain
, rule
, prule
) < 0)
2932 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
2941 static int nf_tables_dump_rules(struct sk_buff
*skb
,
2942 struct netlink_callback
*cb
)
2944 const struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
2945 const struct nft_rule_dump_ctx
*ctx
= cb
->data
;
2946 struct nft_table
*table
;
2947 const struct nft_chain
*chain
;
2948 unsigned int idx
= 0;
2949 struct net
*net
= sock_net(skb
->sk
);
2950 int family
= nfmsg
->nfgen_family
;
2953 cb
->seq
= net
->nft
.base_seq
;
2955 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
2956 if (family
!= NFPROTO_UNSPEC
&& family
!= table
->family
)
2959 if (ctx
&& ctx
->table
&& strcmp(ctx
->table
, table
->name
) != 0)
2962 if (ctx
&& ctx
->table
&& ctx
->chain
) {
2963 struct rhlist_head
*list
, *tmp
;
2965 list
= rhltable_lookup(&table
->chains_ht
, ctx
->chain
,
2966 nft_chain_ht_params
);
2970 rhl_for_each_entry_rcu(chain
, tmp
, list
, rhlhead
) {
2971 if (!nft_is_active(net
, chain
))
2973 __nf_tables_dump_rules(skb
, &idx
,
2980 list_for_each_entry_rcu(chain
, &table
->chains
, list
) {
2981 if (__nf_tables_dump_rules(skb
, &idx
, cb
, table
, chain
))
2985 if (ctx
&& ctx
->table
)
2995 static int nf_tables_dump_rules_start(struct netlink_callback
*cb
)
2997 const struct nlattr
* const *nla
= cb
->data
;
2998 struct nft_rule_dump_ctx
*ctx
= NULL
;
3000 if (nla
[NFTA_RULE_TABLE
] || nla
[NFTA_RULE_CHAIN
]) {
3001 ctx
= kzalloc(sizeof(*ctx
), GFP_ATOMIC
);
3005 if (nla
[NFTA_RULE_TABLE
]) {
3006 ctx
->table
= nla_strdup(nla
[NFTA_RULE_TABLE
],
3013 if (nla
[NFTA_RULE_CHAIN
]) {
3014 ctx
->chain
= nla_strdup(nla
[NFTA_RULE_CHAIN
],
3028 static int nf_tables_dump_rules_done(struct netlink_callback
*cb
)
3030 struct nft_rule_dump_ctx
*ctx
= cb
->data
;
3040 /* called with rcu_read_lock held */
3041 static int nf_tables_getrule(struct net
*net
, struct sock
*nlsk
,
3042 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
3043 const struct nlattr
* const nla
[],
3044 struct netlink_ext_ack
*extack
)
3046 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
3047 u8 genmask
= nft_genmask_cur(net
);
3048 const struct nft_chain
*chain
;
3049 const struct nft_rule
*rule
;
3050 struct nft_table
*table
;
3051 struct sk_buff
*skb2
;
3052 int family
= nfmsg
->nfgen_family
;
3055 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
3056 struct netlink_dump_control c
= {
3057 .start
= nf_tables_dump_rules_start
,
3058 .dump
= nf_tables_dump_rules
,
3059 .done
= nf_tables_dump_rules_done
,
3060 .module
= THIS_MODULE
,
3061 .data
= (void *)nla
,
3064 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
3067 table
= nft_table_lookup(net
, nla
[NFTA_RULE_TABLE
], family
, genmask
, 0);
3068 if (IS_ERR(table
)) {
3069 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_TABLE
]);
3070 return PTR_ERR(table
);
3073 chain
= nft_chain_lookup(net
, table
, nla
[NFTA_RULE_CHAIN
], genmask
);
3074 if (IS_ERR(chain
)) {
3075 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_CHAIN
]);
3076 return PTR_ERR(chain
);
3079 rule
= nft_rule_lookup(chain
, nla
[NFTA_RULE_HANDLE
]);
3081 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_HANDLE
]);
3082 return PTR_ERR(rule
);
3085 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
3089 err
= nf_tables_fill_rule_info(skb2
, net
, NETLINK_CB(skb
).portid
,
3090 nlh
->nlmsg_seq
, NFT_MSG_NEWRULE
, 0,
3091 family
, table
, chain
, rule
, NULL
);
3093 goto err_fill_rule_info
;
3095 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
3102 static void nf_tables_rule_destroy(const struct nft_ctx
*ctx
,
3103 struct nft_rule
*rule
)
3105 struct nft_expr
*expr
, *next
;
3108 * Careful: some expressions might not be initialized in case this
3109 * is called on error from nf_tables_newrule().
3111 expr
= nft_expr_first(rule
);
3112 while (nft_expr_more(rule
, expr
)) {
3113 next
= nft_expr_next(expr
);
3114 nf_tables_expr_destroy(ctx
, expr
);
3120 void nf_tables_rule_release(const struct nft_ctx
*ctx
, struct nft_rule
*rule
)
3122 nft_rule_expr_deactivate(ctx
, rule
, NFT_TRANS_RELEASE
);
3123 nf_tables_rule_destroy(ctx
, rule
);
3126 int nft_chain_validate(const struct nft_ctx
*ctx
, const struct nft_chain
*chain
)
3128 struct nft_expr
*expr
, *last
;
3129 const struct nft_data
*data
;
3130 struct nft_rule
*rule
;
3133 if (ctx
->level
== NFT_JUMP_STACK_SIZE
)
3136 list_for_each_entry(rule
, &chain
->rules
, list
) {
3137 if (!nft_is_active_next(ctx
->net
, rule
))
3140 nft_rule_for_each_expr(expr
, last
, rule
) {
3141 if (!expr
->ops
->validate
)
3144 err
= expr
->ops
->validate(ctx
, expr
, &data
);
3152 EXPORT_SYMBOL_GPL(nft_chain_validate
);
3154 static int nft_table_validate(struct net
*net
, const struct nft_table
*table
)
3156 struct nft_chain
*chain
;
3157 struct nft_ctx ctx
= {
3159 .family
= table
->family
,
3163 list_for_each_entry(chain
, &table
->chains
, list
) {
3164 if (!nft_is_base_chain(chain
))
3168 err
= nft_chain_validate(&ctx
, chain
);
3176 static struct nft_rule
*nft_rule_lookup_byid(const struct net
*net
,
3177 const struct nlattr
*nla
);
3179 #define NFT_RULE_MAXEXPRS 128
3181 static int nf_tables_newrule(struct net
*net
, struct sock
*nlsk
,
3182 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
3183 const struct nlattr
* const nla
[],
3184 struct netlink_ext_ack
*extack
)
3186 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
3187 u8 genmask
= nft_genmask_next(net
);
3188 struct nft_expr_info
*info
= NULL
;
3189 int family
= nfmsg
->nfgen_family
;
3190 struct nft_flow_rule
*flow
;
3191 struct nft_table
*table
;
3192 struct nft_chain
*chain
;
3193 struct nft_rule
*rule
, *old_rule
= NULL
;
3194 struct nft_userdata
*udata
;
3195 struct nft_trans
*trans
= NULL
;
3196 struct nft_expr
*expr
;
3199 unsigned int size
, i
, n
, ulen
= 0, usize
= 0;
3201 u64 handle
, pos_handle
;
3203 lockdep_assert_held(&net
->nft
.commit_mutex
);
3205 table
= nft_table_lookup(net
, nla
[NFTA_RULE_TABLE
], family
, genmask
,
3206 NETLINK_CB(skb
).portid
);
3207 if (IS_ERR(table
)) {
3208 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_TABLE
]);
3209 return PTR_ERR(table
);
3212 if (nla
[NFTA_RULE_CHAIN
]) {
3213 chain
= nft_chain_lookup(net
, table
, nla
[NFTA_RULE_CHAIN
],
3215 if (IS_ERR(chain
)) {
3216 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_CHAIN
]);
3217 return PTR_ERR(chain
);
3219 if (nft_chain_is_bound(chain
))
3222 } else if (nla
[NFTA_RULE_CHAIN_ID
]) {
3223 chain
= nft_chain_lookup_byid(net
, nla
[NFTA_RULE_CHAIN_ID
]);
3224 if (IS_ERR(chain
)) {
3225 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_CHAIN_ID
]);
3226 return PTR_ERR(chain
);
3232 if (nla
[NFTA_RULE_HANDLE
]) {
3233 handle
= be64_to_cpu(nla_get_be64(nla
[NFTA_RULE_HANDLE
]));
3234 rule
= __nft_rule_lookup(chain
, handle
);
3236 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_HANDLE
]);
3237 return PTR_ERR(rule
);
3240 if (nlh
->nlmsg_flags
& NLM_F_EXCL
) {
3241 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_HANDLE
]);
3244 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
3249 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
) ||
3250 nlh
->nlmsg_flags
& NLM_F_REPLACE
)
3252 handle
= nf_tables_alloc_handle(table
);
3254 if (chain
->use
== UINT_MAX
)
3257 if (nla
[NFTA_RULE_POSITION
]) {
3258 pos_handle
= be64_to_cpu(nla_get_be64(nla
[NFTA_RULE_POSITION
]));
3259 old_rule
= __nft_rule_lookup(chain
, pos_handle
);
3260 if (IS_ERR(old_rule
)) {
3261 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_POSITION
]);
3262 return PTR_ERR(old_rule
);
3264 } else if (nla
[NFTA_RULE_POSITION_ID
]) {
3265 old_rule
= nft_rule_lookup_byid(net
, nla
[NFTA_RULE_POSITION_ID
]);
3266 if (IS_ERR(old_rule
)) {
3267 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_POSITION_ID
]);
3268 return PTR_ERR(old_rule
);
3273 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, chain
, nla
);
3277 if (nla
[NFTA_RULE_EXPRESSIONS
]) {
3278 info
= kvmalloc_array(NFT_RULE_MAXEXPRS
,
3279 sizeof(struct nft_expr_info
),
3284 nla_for_each_nested(tmp
, nla
[NFTA_RULE_EXPRESSIONS
], rem
) {
3286 if (nla_type(tmp
) != NFTA_LIST_ELEM
)
3288 if (n
== NFT_RULE_MAXEXPRS
)
3290 err
= nf_tables_expr_parse(&ctx
, tmp
, &info
[n
]);
3293 size
+= info
[n
].ops
->size
;
3297 /* Check for overflow of dlen field */
3299 if (size
>= 1 << 12)
3302 if (nla
[NFTA_RULE_USERDATA
]) {
3303 ulen
= nla_len(nla
[NFTA_RULE_USERDATA
]);
3305 usize
= sizeof(struct nft_userdata
) + ulen
;
3309 rule
= kzalloc(sizeof(*rule
) + size
+ usize
, GFP_KERNEL
);
3313 nft_activate_next(net
, rule
);
3315 rule
->handle
= handle
;
3317 rule
->udata
= ulen
? 1 : 0;
3320 udata
= nft_userdata(rule
);
3321 udata
->len
= ulen
- 1;
3322 nla_memcpy(udata
->data
, nla
[NFTA_RULE_USERDATA
], ulen
);
3325 expr
= nft_expr_first(rule
);
3326 for (i
= 0; i
< n
; i
++) {
3327 err
= nf_tables_newexpr(&ctx
, &info
[i
], expr
);
3329 NL_SET_BAD_ATTR(extack
, info
[i
].attr
);
3333 if (info
[i
].ops
->validate
)
3334 nft_validate_state_update(net
, NFT_VALIDATE_NEED
);
3337 expr
= nft_expr_next(expr
);
3340 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
) {
3341 trans
= nft_trans_rule_add(&ctx
, NFT_MSG_NEWRULE
, rule
);
3342 if (trans
== NULL
) {
3346 err
= nft_delrule(&ctx
, old_rule
);
3348 nft_trans_destroy(trans
);
3352 list_add_tail_rcu(&rule
->list
, &old_rule
->list
);
3354 trans
= nft_trans_rule_add(&ctx
, NFT_MSG_NEWRULE
, rule
);
3360 if (nlh
->nlmsg_flags
& NLM_F_APPEND
) {
3362 list_add_rcu(&rule
->list
, &old_rule
->list
);
3364 list_add_tail_rcu(&rule
->list
, &chain
->rules
);
3367 list_add_tail_rcu(&rule
->list
, &old_rule
->list
);
3369 list_add_rcu(&rule
->list
, &chain
->rules
);
3375 if (net
->nft
.validate_state
== NFT_VALIDATE_DO
)
3376 return nft_table_validate(net
, table
);
3378 if (chain
->flags
& NFT_CHAIN_HW_OFFLOAD
) {
3379 flow
= nft_flow_rule_create(net
, rule
);
3381 return PTR_ERR(flow
);
3383 nft_trans_flow_rule(trans
) = flow
;
3388 nf_tables_rule_release(&ctx
, rule
);
3390 for (i
= 0; i
< n
; i
++) {
3392 module_put(info
[i
].ops
->type
->owner
);
3393 if (info
[i
].ops
->type
->release_ops
)
3394 info
[i
].ops
->type
->release_ops(info
[i
].ops
);
3401 static struct nft_rule
*nft_rule_lookup_byid(const struct net
*net
,
3402 const struct nlattr
*nla
)
3404 u32 id
= ntohl(nla_get_be32(nla
));
3405 struct nft_trans
*trans
;
3407 list_for_each_entry(trans
, &net
->nft
.commit_list
, list
) {
3408 struct nft_rule
*rule
= nft_trans_rule(trans
);
3410 if (trans
->msg_type
== NFT_MSG_NEWRULE
&&
3411 id
== nft_trans_rule_id(trans
))
3414 return ERR_PTR(-ENOENT
);
3417 static int nf_tables_delrule(struct net
*net
, struct sock
*nlsk
,
3418 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
3419 const struct nlattr
* const nla
[],
3420 struct netlink_ext_ack
*extack
)
3422 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
3423 u8 genmask
= nft_genmask_next(net
);
3424 struct nft_table
*table
;
3425 struct nft_chain
*chain
= NULL
;
3426 struct nft_rule
*rule
;
3427 int family
= nfmsg
->nfgen_family
, err
= 0;
3430 table
= nft_table_lookup(net
, nla
[NFTA_RULE_TABLE
], family
, genmask
,
3431 NETLINK_CB(skb
).portid
);
3432 if (IS_ERR(table
)) {
3433 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_TABLE
]);
3434 return PTR_ERR(table
);
3437 if (nla
[NFTA_RULE_CHAIN
]) {
3438 chain
= nft_chain_lookup(net
, table
, nla
[NFTA_RULE_CHAIN
],
3440 if (IS_ERR(chain
)) {
3441 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_CHAIN
]);
3442 return PTR_ERR(chain
);
3444 if (nft_chain_is_bound(chain
))
3448 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, chain
, nla
);
3451 if (nla
[NFTA_RULE_HANDLE
]) {
3452 rule
= nft_rule_lookup(chain
, nla
[NFTA_RULE_HANDLE
]);
3454 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_HANDLE
]);
3455 return PTR_ERR(rule
);
3458 err
= nft_delrule(&ctx
, rule
);
3459 } else if (nla
[NFTA_RULE_ID
]) {
3460 rule
= nft_rule_lookup_byid(net
, nla
[NFTA_RULE_ID
]);
3462 NL_SET_BAD_ATTR(extack
, nla
[NFTA_RULE_ID
]);
3463 return PTR_ERR(rule
);
3466 err
= nft_delrule(&ctx
, rule
);
3468 err
= nft_delrule_by_chain(&ctx
);
3471 list_for_each_entry(chain
, &table
->chains
, list
) {
3472 if (!nft_is_active_next(net
, chain
))
3476 err
= nft_delrule_by_chain(&ctx
);
3488 static const struct nft_set_type
*nft_set_types
[] = {
3489 &nft_set_hash_fast_type
,
3491 &nft_set_rhash_type
,
3492 &nft_set_bitmap_type
,
3493 &nft_set_rbtree_type
,
3494 #if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
3495 &nft_set_pipapo_avx2_type
,
3497 &nft_set_pipapo_type
,
3500 #define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
3501 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3504 static bool nft_set_ops_candidate(const struct nft_set_type
*type
, u32 flags
)
3506 return (flags
& type
->features
) == (flags
& NFT_SET_FEATURES
);
3510 * Select a set implementation based on the data characteristics and the
3511 * given policy. The total memory use might not be known if no size is
3512 * given, in that case the amount of memory per element is used.
3514 static const struct nft_set_ops
*
3515 nft_select_set_ops(const struct nft_ctx
*ctx
,
3516 const struct nlattr
* const nla
[],
3517 const struct nft_set_desc
*desc
,
3518 enum nft_set_policies policy
)
3520 const struct nft_set_ops
*ops
, *bops
;
3521 struct nft_set_estimate est
, best
;
3522 const struct nft_set_type
*type
;
3526 lockdep_assert_held(&ctx
->net
->nft
.commit_mutex
);
3527 lockdep_nfnl_nft_mutex_not_held();
3529 if (nla
[NFTA_SET_FLAGS
] != NULL
)
3530 flags
= ntohl(nla_get_be32(nla
[NFTA_SET_FLAGS
]));
3537 for (i
= 0; i
< ARRAY_SIZE(nft_set_types
); i
++) {
3538 type
= nft_set_types
[i
];
3541 if (!nft_set_ops_candidate(type
, flags
))
3543 if (!ops
->estimate(desc
, flags
, &est
))
3547 case NFT_SET_POL_PERFORMANCE
:
3548 if (est
.lookup
< best
.lookup
)
3550 if (est
.lookup
== best
.lookup
&&
3551 est
.space
< best
.space
)
3554 case NFT_SET_POL_MEMORY
:
3556 if (est
.space
< best
.space
)
3558 if (est
.space
== best
.space
&&
3559 est
.lookup
< best
.lookup
)
3561 } else if (est
.size
< best
.size
|| !bops
) {
3576 return ERR_PTR(-EOPNOTSUPP
);
3579 static const struct nla_policy nft_set_policy
[NFTA_SET_MAX
+ 1] = {
3580 [NFTA_SET_TABLE
] = { .type
= NLA_STRING
,
3581 .len
= NFT_TABLE_MAXNAMELEN
- 1 },
3582 [NFTA_SET_NAME
] = { .type
= NLA_STRING
,
3583 .len
= NFT_SET_MAXNAMELEN
- 1 },
3584 [NFTA_SET_FLAGS
] = { .type
= NLA_U32
},
3585 [NFTA_SET_KEY_TYPE
] = { .type
= NLA_U32
},
3586 [NFTA_SET_KEY_LEN
] = { .type
= NLA_U32
},
3587 [NFTA_SET_DATA_TYPE
] = { .type
= NLA_U32
},
3588 [NFTA_SET_DATA_LEN
] = { .type
= NLA_U32
},
3589 [NFTA_SET_POLICY
] = { .type
= NLA_U32
},
3590 [NFTA_SET_DESC
] = { .type
= NLA_NESTED
},
3591 [NFTA_SET_ID
] = { .type
= NLA_U32
},
3592 [NFTA_SET_TIMEOUT
] = { .type
= NLA_U64
},
3593 [NFTA_SET_GC_INTERVAL
] = { .type
= NLA_U32
},
3594 [NFTA_SET_USERDATA
] = { .type
= NLA_BINARY
,
3595 .len
= NFT_USERDATA_MAXLEN
},
3596 [NFTA_SET_OBJ_TYPE
] = { .type
= NLA_U32
},
3597 [NFTA_SET_HANDLE
] = { .type
= NLA_U64
},
3598 [NFTA_SET_EXPR
] = { .type
= NLA_NESTED
},
3599 [NFTA_SET_EXPRESSIONS
] = { .type
= NLA_NESTED
},
3602 static const struct nla_policy nft_set_desc_policy
[NFTA_SET_DESC_MAX
+ 1] = {
3603 [NFTA_SET_DESC_SIZE
] = { .type
= NLA_U32
},
3604 [NFTA_SET_DESC_CONCAT
] = { .type
= NLA_NESTED
},
3607 static int nft_ctx_init_from_setattr(struct nft_ctx
*ctx
, struct net
*net
,
3608 const struct sk_buff
*skb
,
3609 const struct nlmsghdr
*nlh
,
3610 const struct nlattr
* const nla
[],
3611 struct netlink_ext_ack
*extack
,
3612 u8 genmask
, u32 nlpid
)
3614 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
3615 int family
= nfmsg
->nfgen_family
;
3616 struct nft_table
*table
= NULL
;
3618 if (nla
[NFTA_SET_TABLE
] != NULL
) {
3619 table
= nft_table_lookup(net
, nla
[NFTA_SET_TABLE
], family
,
3621 if (IS_ERR(table
)) {
3622 NL_SET_BAD_ATTR(extack
, nla
[NFTA_SET_TABLE
]);
3623 return PTR_ERR(table
);
3627 nft_ctx_init(ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
3631 static struct nft_set
*nft_set_lookup(const struct nft_table
*table
,
3632 const struct nlattr
*nla
, u8 genmask
)
3634 struct nft_set
*set
;
3637 return ERR_PTR(-EINVAL
);
3639 list_for_each_entry_rcu(set
, &table
->sets
, list
) {
3640 if (!nla_strcmp(nla
, set
->name
) &&
3641 nft_active_genmask(set
, genmask
))
3644 return ERR_PTR(-ENOENT
);
3647 static struct nft_set
*nft_set_lookup_byhandle(const struct nft_table
*table
,
3648 const struct nlattr
*nla
,
3651 struct nft_set
*set
;
3653 list_for_each_entry(set
, &table
->sets
, list
) {
3654 if (be64_to_cpu(nla_get_be64(nla
)) == set
->handle
&&
3655 nft_active_genmask(set
, genmask
))
3658 return ERR_PTR(-ENOENT
);
3661 static struct nft_set
*nft_set_lookup_byid(const struct net
*net
,
3662 const struct nlattr
*nla
, u8 genmask
)
3664 struct nft_trans
*trans
;
3665 u32 id
= ntohl(nla_get_be32(nla
));
3667 list_for_each_entry(trans
, &net
->nft
.commit_list
, list
) {
3668 if (trans
->msg_type
== NFT_MSG_NEWSET
) {
3669 struct nft_set
*set
= nft_trans_set(trans
);
3671 if (id
== nft_trans_set_id(trans
) &&
3672 nft_active_genmask(set
, genmask
))
3676 return ERR_PTR(-ENOENT
);
3679 struct nft_set
*nft_set_lookup_global(const struct net
*net
,
3680 const struct nft_table
*table
,
3681 const struct nlattr
*nla_set_name
,
3682 const struct nlattr
*nla_set_id
,
3685 struct nft_set
*set
;
3687 set
= nft_set_lookup(table
, nla_set_name
, genmask
);
3692 set
= nft_set_lookup_byid(net
, nla_set_id
, genmask
);
3696 EXPORT_SYMBOL_GPL(nft_set_lookup_global
);
3698 static int nf_tables_set_alloc_name(struct nft_ctx
*ctx
, struct nft_set
*set
,
3701 const struct nft_set
*i
;
3703 unsigned long *inuse
;
3704 unsigned int n
= 0, min
= 0;
3706 p
= strchr(name
, '%');
3708 if (p
[1] != 'd' || strchr(p
+ 2, '%'))
3711 inuse
= (unsigned long *)get_zeroed_page(GFP_KERNEL
);
3715 list_for_each_entry(i
, &ctx
->table
->sets
, list
) {
3718 if (!nft_is_active_next(ctx
->net
, set
))
3720 if (!sscanf(i
->name
, name
, &tmp
))
3722 if (tmp
< min
|| tmp
>= min
+ BITS_PER_BYTE
* PAGE_SIZE
)
3725 set_bit(tmp
- min
, inuse
);
3728 n
= find_first_zero_bit(inuse
, BITS_PER_BYTE
* PAGE_SIZE
);
3729 if (n
>= BITS_PER_BYTE
* PAGE_SIZE
) {
3730 min
+= BITS_PER_BYTE
* PAGE_SIZE
;
3731 memset(inuse
, 0, PAGE_SIZE
);
3734 free_page((unsigned long)inuse
);
3737 set
->name
= kasprintf(GFP_KERNEL
, name
, min
+ n
);
3741 list_for_each_entry(i
, &ctx
->table
->sets
, list
) {
3742 if (!nft_is_active_next(ctx
->net
, i
))
3744 if (!strcmp(set
->name
, i
->name
)) {
3753 int nf_msecs_to_jiffies64(const struct nlattr
*nla
, u64
*result
)
3755 u64 ms
= be64_to_cpu(nla_get_be64(nla
));
3756 u64 max
= (u64
)(~((u64
)0));
3758 max
= div_u64(max
, NSEC_PER_MSEC
);
3762 ms
*= NSEC_PER_MSEC
;
3763 *result
= nsecs_to_jiffies64(ms
);
3767 __be64
nf_jiffies64_to_msecs(u64 input
)
3769 return cpu_to_be64(jiffies64_to_msecs(input
));
3772 static int nf_tables_fill_set_concat(struct sk_buff
*skb
,
3773 const struct nft_set
*set
)
3775 struct nlattr
*concat
, *field
;
3778 concat
= nla_nest_start_noflag(skb
, NFTA_SET_DESC_CONCAT
);
3782 for (i
= 0; i
< set
->field_count
; i
++) {
3783 field
= nla_nest_start_noflag(skb
, NFTA_LIST_ELEM
);
3787 if (nla_put_be32(skb
, NFTA_SET_FIELD_LEN
,
3788 htonl(set
->field_len
[i
])))
3791 nla_nest_end(skb
, field
);
3794 nla_nest_end(skb
, concat
);
3799 static int nf_tables_fill_set(struct sk_buff
*skb
, const struct nft_ctx
*ctx
,
3800 const struct nft_set
*set
, u16 event
, u16 flags
)
3802 struct nfgenmsg
*nfmsg
;
3803 struct nlmsghdr
*nlh
;
3804 u32 portid
= ctx
->portid
;
3805 struct nlattr
*nest
;
3809 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
3810 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
),
3813 goto nla_put_failure
;
3815 nfmsg
= nlmsg_data(nlh
);
3816 nfmsg
->nfgen_family
= ctx
->family
;
3817 nfmsg
->version
= NFNETLINK_V0
;
3818 nfmsg
->res_id
= htons(ctx
->net
->nft
.base_seq
& 0xffff);
3820 if (nla_put_string(skb
, NFTA_SET_TABLE
, ctx
->table
->name
))
3821 goto nla_put_failure
;
3822 if (nla_put_string(skb
, NFTA_SET_NAME
, set
->name
))
3823 goto nla_put_failure
;
3824 if (nla_put_be64(skb
, NFTA_SET_HANDLE
, cpu_to_be64(set
->handle
),
3826 goto nla_put_failure
;
3827 if (set
->flags
!= 0)
3828 if (nla_put_be32(skb
, NFTA_SET_FLAGS
, htonl(set
->flags
)))
3829 goto nla_put_failure
;
3831 if (nla_put_be32(skb
, NFTA_SET_KEY_TYPE
, htonl(set
->ktype
)))
3832 goto nla_put_failure
;
3833 if (nla_put_be32(skb
, NFTA_SET_KEY_LEN
, htonl(set
->klen
)))
3834 goto nla_put_failure
;
3835 if (set
->flags
& NFT_SET_MAP
) {
3836 if (nla_put_be32(skb
, NFTA_SET_DATA_TYPE
, htonl(set
->dtype
)))
3837 goto nla_put_failure
;
3838 if (nla_put_be32(skb
, NFTA_SET_DATA_LEN
, htonl(set
->dlen
)))
3839 goto nla_put_failure
;
3841 if (set
->flags
& NFT_SET_OBJECT
&&
3842 nla_put_be32(skb
, NFTA_SET_OBJ_TYPE
, htonl(set
->objtype
)))
3843 goto nla_put_failure
;
3846 nla_put_be64(skb
, NFTA_SET_TIMEOUT
,
3847 nf_jiffies64_to_msecs(set
->timeout
),
3849 goto nla_put_failure
;
3851 nla_put_be32(skb
, NFTA_SET_GC_INTERVAL
, htonl(set
->gc_int
)))
3852 goto nla_put_failure
;
3854 if (set
->policy
!= NFT_SET_POL_PERFORMANCE
) {
3855 if (nla_put_be32(skb
, NFTA_SET_POLICY
, htonl(set
->policy
)))
3856 goto nla_put_failure
;
3860 nla_put(skb
, NFTA_SET_USERDATA
, set
->udlen
, set
->udata
))
3861 goto nla_put_failure
;
3863 nest
= nla_nest_start_noflag(skb
, NFTA_SET_DESC
);
3865 goto nla_put_failure
;
3867 nla_put_be32(skb
, NFTA_SET_DESC_SIZE
, htonl(set
->size
)))
3868 goto nla_put_failure
;
3870 if (set
->field_count
> 1 &&
3871 nf_tables_fill_set_concat(skb
, set
))
3872 goto nla_put_failure
;
3874 nla_nest_end(skb
, nest
);
3876 if (set
->num_exprs
== 1) {
3877 nest
= nla_nest_start_noflag(skb
, NFTA_SET_EXPR
);
3878 if (nf_tables_fill_expr_info(skb
, set
->exprs
[0]) < 0)
3879 goto nla_put_failure
;
3881 nla_nest_end(skb
, nest
);
3882 } else if (set
->num_exprs
> 1) {
3883 nest
= nla_nest_start_noflag(skb
, NFTA_SET_EXPRESSIONS
);
3885 goto nla_put_failure
;
3887 for (i
= 0; i
< set
->num_exprs
; i
++) {
3888 if (nft_expr_dump(skb
, NFTA_LIST_ELEM
,
3890 goto nla_put_failure
;
3892 nla_nest_end(skb
, nest
);
3895 nlmsg_end(skb
, nlh
);
3899 nlmsg_trim(skb
, nlh
);
3903 static void nf_tables_set_notify(const struct nft_ctx
*ctx
,
3904 const struct nft_set
*set
, int event
,
3907 struct sk_buff
*skb
;
3908 u32 portid
= ctx
->portid
;
3910 char *buf
= kasprintf(gfp_flags
, "%s:%llu;%s:%llu",
3911 ctx
->table
->name
, ctx
->table
->handle
,
3912 set
->name
, set
->handle
);
3914 audit_log_nfcfg(buf
,
3917 event
== NFT_MSG_NEWSET
?
3918 AUDIT_NFT_OP_SET_REGISTER
:
3919 AUDIT_NFT_OP_SET_UNREGISTER
,
3924 !nfnetlink_has_listeners(ctx
->net
, NFNLGRP_NFTABLES
))
3927 skb
= nlmsg_new(NLMSG_GOODSIZE
, gfp_flags
);
3931 err
= nf_tables_fill_set(skb
, ctx
, set
, event
, 0);
3937 nft_notify_enqueue(skb
, ctx
->report
, &ctx
->net
->nft
.notify_list
);
3940 nfnetlink_set_err(ctx
->net
, portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
3943 static int nf_tables_dump_sets(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3945 const struct nft_set
*set
;
3946 unsigned int idx
, s_idx
= cb
->args
[0];
3947 struct nft_table
*table
, *cur_table
= (struct nft_table
*)cb
->args
[2];
3948 struct net
*net
= sock_net(skb
->sk
);
3949 struct nft_ctx
*ctx
= cb
->data
, ctx_set
;
3955 cb
->seq
= net
->nft
.base_seq
;
3957 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
3958 if (ctx
->family
!= NFPROTO_UNSPEC
&&
3959 ctx
->family
!= table
->family
)
3962 if (ctx
->table
&& ctx
->table
!= table
)
3966 if (cur_table
!= table
)
3972 list_for_each_entry_rcu(set
, &table
->sets
, list
) {
3975 if (!nft_is_active(net
, set
))
3979 ctx_set
.table
= table
;
3980 ctx_set
.family
= table
->family
;
3982 if (nf_tables_fill_set(skb
, &ctx_set
, set
,
3986 cb
->args
[2] = (unsigned long) table
;
3989 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4002 static int nf_tables_dump_sets_start(struct netlink_callback
*cb
)
4004 struct nft_ctx
*ctx_dump
= NULL
;
4006 ctx_dump
= kmemdup(cb
->data
, sizeof(*ctx_dump
), GFP_ATOMIC
);
4007 if (ctx_dump
== NULL
)
4010 cb
->data
= ctx_dump
;
4014 static int nf_tables_dump_sets_done(struct netlink_callback
*cb
)
4020 /* called with rcu_read_lock held */
4021 static int nf_tables_getset(struct net
*net
, struct sock
*nlsk
,
4022 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
4023 const struct nlattr
* const nla
[],
4024 struct netlink_ext_ack
*extack
)
4026 u8 genmask
= nft_genmask_cur(net
);
4027 const struct nft_set
*set
;
4029 struct sk_buff
*skb2
;
4030 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
4033 /* Verify existence before starting dump */
4034 err
= nft_ctx_init_from_setattr(&ctx
, net
, skb
, nlh
, nla
, extack
,
4039 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
4040 struct netlink_dump_control c
= {
4041 .start
= nf_tables_dump_sets_start
,
4042 .dump
= nf_tables_dump_sets
,
4043 .done
= nf_tables_dump_sets_done
,
4045 .module
= THIS_MODULE
,
4048 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
4051 /* Only accept unspec with dump */
4052 if (nfmsg
->nfgen_family
== NFPROTO_UNSPEC
)
4053 return -EAFNOSUPPORT
;
4054 if (!nla
[NFTA_SET_TABLE
])
4057 set
= nft_set_lookup(ctx
.table
, nla
[NFTA_SET_NAME
], genmask
);
4059 return PTR_ERR(set
);
4061 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
4065 err
= nf_tables_fill_set(skb2
, &ctx
, set
, NFT_MSG_NEWSET
, 0);
4067 goto err_fill_set_info
;
4069 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
4076 static const struct nla_policy nft_concat_policy
[NFTA_SET_FIELD_MAX
+ 1] = {
4077 [NFTA_SET_FIELD_LEN
] = { .type
= NLA_U32
},
4080 static int nft_set_desc_concat_parse(const struct nlattr
*attr
,
4081 struct nft_set_desc
*desc
)
4083 struct nlattr
*tb
[NFTA_SET_FIELD_MAX
+ 1];
4087 err
= nla_parse_nested_deprecated(tb
, NFTA_SET_FIELD_MAX
, attr
,
4088 nft_concat_policy
, NULL
);
4092 if (!tb
[NFTA_SET_FIELD_LEN
])
4095 len
= ntohl(nla_get_be32(tb
[NFTA_SET_FIELD_LEN
]));
4097 if (len
* BITS_PER_BYTE
/ 32 > NFT_REG32_COUNT
)
4100 desc
->field_len
[desc
->field_count
++] = len
;
4105 static int nft_set_desc_concat(struct nft_set_desc
*desc
,
4106 const struct nlattr
*nla
)
4108 struct nlattr
*attr
;
4111 nla_for_each_nested(attr
, nla
, rem
) {
4112 if (nla_type(attr
) != NFTA_LIST_ELEM
)
4115 err
= nft_set_desc_concat_parse(attr
, desc
);
4123 static int nf_tables_set_desc_parse(struct nft_set_desc
*desc
,
4124 const struct nlattr
*nla
)
4126 struct nlattr
*da
[NFTA_SET_DESC_MAX
+ 1];
4129 err
= nla_parse_nested_deprecated(da
, NFTA_SET_DESC_MAX
, nla
,
4130 nft_set_desc_policy
, NULL
);
4134 if (da
[NFTA_SET_DESC_SIZE
] != NULL
)
4135 desc
->size
= ntohl(nla_get_be32(da
[NFTA_SET_DESC_SIZE
]));
4136 if (da
[NFTA_SET_DESC_CONCAT
])
4137 err
= nft_set_desc_concat(desc
, da
[NFTA_SET_DESC_CONCAT
]);
4142 static int nf_tables_newset(struct net
*net
, struct sock
*nlsk
,
4143 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
4144 const struct nlattr
* const nla
[],
4145 struct netlink_ext_ack
*extack
)
4147 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
4148 u8 genmask
= nft_genmask_next(net
);
4149 int family
= nfmsg
->nfgen_family
;
4150 const struct nft_set_ops
*ops
;
4151 struct nft_expr
*expr
= NULL
;
4152 struct nft_table
*table
;
4153 struct nft_set
*set
;
4158 u32 ktype
, dtype
, flags
, policy
, gc_int
, objtype
;
4159 struct nft_set_desc desc
;
4160 unsigned char *udata
;
4165 if (nla
[NFTA_SET_TABLE
] == NULL
||
4166 nla
[NFTA_SET_NAME
] == NULL
||
4167 nla
[NFTA_SET_KEY_LEN
] == NULL
||
4168 nla
[NFTA_SET_ID
] == NULL
)
4171 memset(&desc
, 0, sizeof(desc
));
4173 ktype
= NFT_DATA_VALUE
;
4174 if (nla
[NFTA_SET_KEY_TYPE
] != NULL
) {
4175 ktype
= ntohl(nla_get_be32(nla
[NFTA_SET_KEY_TYPE
]));
4176 if ((ktype
& NFT_DATA_RESERVED_MASK
) == NFT_DATA_RESERVED_MASK
)
4180 desc
.klen
= ntohl(nla_get_be32(nla
[NFTA_SET_KEY_LEN
]));
4181 if (desc
.klen
== 0 || desc
.klen
> NFT_DATA_VALUE_MAXLEN
)
4185 if (nla
[NFTA_SET_FLAGS
] != NULL
) {
4186 flags
= ntohl(nla_get_be32(nla
[NFTA_SET_FLAGS
]));
4187 if (flags
& ~(NFT_SET_ANONYMOUS
| NFT_SET_CONSTANT
|
4188 NFT_SET_INTERVAL
| NFT_SET_TIMEOUT
|
4189 NFT_SET_MAP
| NFT_SET_EVAL
|
4190 NFT_SET_OBJECT
| NFT_SET_CONCAT
| NFT_SET_EXPR
))
4192 /* Only one of these operations is supported */
4193 if ((flags
& (NFT_SET_MAP
| NFT_SET_OBJECT
)) ==
4194 (NFT_SET_MAP
| NFT_SET_OBJECT
))
4196 if ((flags
& (NFT_SET_EVAL
| NFT_SET_OBJECT
)) ==
4197 (NFT_SET_EVAL
| NFT_SET_OBJECT
))
4202 if (nla
[NFTA_SET_DATA_TYPE
] != NULL
) {
4203 if (!(flags
& NFT_SET_MAP
))
4206 dtype
= ntohl(nla_get_be32(nla
[NFTA_SET_DATA_TYPE
]));
4207 if ((dtype
& NFT_DATA_RESERVED_MASK
) == NFT_DATA_RESERVED_MASK
&&
4208 dtype
!= NFT_DATA_VERDICT
)
4211 if (dtype
!= NFT_DATA_VERDICT
) {
4212 if (nla
[NFTA_SET_DATA_LEN
] == NULL
)
4214 desc
.dlen
= ntohl(nla_get_be32(nla
[NFTA_SET_DATA_LEN
]));
4215 if (desc
.dlen
== 0 || desc
.dlen
> NFT_DATA_VALUE_MAXLEN
)
4218 desc
.dlen
= sizeof(struct nft_verdict
);
4219 } else if (flags
& NFT_SET_MAP
)
4222 if (nla
[NFTA_SET_OBJ_TYPE
] != NULL
) {
4223 if (!(flags
& NFT_SET_OBJECT
))
4226 objtype
= ntohl(nla_get_be32(nla
[NFTA_SET_OBJ_TYPE
]));
4227 if (objtype
== NFT_OBJECT_UNSPEC
||
4228 objtype
> NFT_OBJECT_MAX
)
4230 } else if (flags
& NFT_SET_OBJECT
)
4233 objtype
= NFT_OBJECT_UNSPEC
;
4236 if (nla
[NFTA_SET_TIMEOUT
] != NULL
) {
4237 if (!(flags
& NFT_SET_TIMEOUT
))
4240 err
= nf_msecs_to_jiffies64(nla
[NFTA_SET_TIMEOUT
], &timeout
);
4245 if (nla
[NFTA_SET_GC_INTERVAL
] != NULL
) {
4246 if (!(flags
& NFT_SET_TIMEOUT
))
4248 gc_int
= ntohl(nla_get_be32(nla
[NFTA_SET_GC_INTERVAL
]));
4251 policy
= NFT_SET_POL_PERFORMANCE
;
4252 if (nla
[NFTA_SET_POLICY
] != NULL
)
4253 policy
= ntohl(nla_get_be32(nla
[NFTA_SET_POLICY
]));
4255 if (nla
[NFTA_SET_DESC
] != NULL
) {
4256 err
= nf_tables_set_desc_parse(&desc
, nla
[NFTA_SET_DESC
]);
4261 if (nla
[NFTA_SET_EXPR
] || nla
[NFTA_SET_EXPRESSIONS
])
4264 table
= nft_table_lookup(net
, nla
[NFTA_SET_TABLE
], family
, genmask
,
4265 NETLINK_CB(skb
).portid
);
4266 if (IS_ERR(table
)) {
4267 NL_SET_BAD_ATTR(extack
, nla
[NFTA_SET_TABLE
]);
4268 return PTR_ERR(table
);
4271 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
4273 set
= nft_set_lookup(table
, nla
[NFTA_SET_NAME
], genmask
);
4275 if (PTR_ERR(set
) != -ENOENT
) {
4276 NL_SET_BAD_ATTR(extack
, nla
[NFTA_SET_NAME
]);
4277 return PTR_ERR(set
);
4280 if (nlh
->nlmsg_flags
& NLM_F_EXCL
) {
4281 NL_SET_BAD_ATTR(extack
, nla
[NFTA_SET_NAME
]);
4284 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
4290 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
))
4293 ops
= nft_select_set_ops(&ctx
, nla
, &desc
, policy
);
4295 return PTR_ERR(ops
);
4298 if (nla
[NFTA_SET_USERDATA
])
4299 udlen
= nla_len(nla
[NFTA_SET_USERDATA
]);
4302 if (ops
->privsize
!= NULL
)
4303 size
= ops
->privsize(nla
, &desc
);
4305 set
= kvzalloc(sizeof(*set
) + size
+ udlen
, GFP_KERNEL
);
4309 name
= nla_strdup(nla
[NFTA_SET_NAME
], GFP_KERNEL
);
4315 err
= nf_tables_set_alloc_name(&ctx
, set
, name
);
4318 goto err_set_alloc_name
;
4320 if (nla
[NFTA_SET_EXPR
]) {
4321 expr
= nft_set_elem_expr_alloc(&ctx
, set
, nla
[NFTA_SET_EXPR
]);
4323 err
= PTR_ERR(expr
);
4324 goto err_set_alloc_name
;
4326 set
->exprs
[0] = expr
;
4328 } else if (nla
[NFTA_SET_EXPRESSIONS
]) {
4329 struct nft_expr
*expr
;
4333 if (!(flags
& NFT_SET_EXPR
)) {
4335 goto err_set_alloc_name
;
4338 nla_for_each_nested(tmp
, nla
[NFTA_SET_EXPRESSIONS
], left
) {
4339 if (i
== NFT_SET_EXPR_MAX
) {
4343 if (nla_type(tmp
) != NFTA_LIST_ELEM
) {
4347 expr
= nft_set_elem_expr_alloc(&ctx
, set
, tmp
);
4349 err
= PTR_ERR(expr
);
4352 set
->exprs
[i
++] = expr
;
4359 udata
= set
->data
+ size
;
4360 nla_memcpy(udata
, nla
[NFTA_SET_USERDATA
], udlen
);
4363 INIT_LIST_HEAD(&set
->bindings
);
4365 write_pnet(&set
->net
, net
);
4368 set
->klen
= desc
.klen
;
4370 set
->objtype
= objtype
;
4371 set
->dlen
= desc
.dlen
;
4373 set
->size
= desc
.size
;
4374 set
->policy
= policy
;
4377 set
->timeout
= timeout
;
4378 set
->gc_int
= gc_int
;
4379 set
->handle
= nf_tables_alloc_handle(table
);
4381 set
->field_count
= desc
.field_count
;
4382 for (i
= 0; i
< desc
.field_count
; i
++)
4383 set
->field_len
[i
] = desc
.field_len
[i
];
4385 err
= ops
->init(set
, &desc
, nla
);
4389 err
= nft_trans_set_add(&ctx
, NFT_MSG_NEWSET
, set
);
4393 list_add_tail_rcu(&set
->list
, &table
->sets
);
4400 for (i
= 0; i
< set
->num_exprs
; i
++)
4401 nft_expr_destroy(&ctx
, set
->exprs
[i
]);
4409 static void nft_set_destroy(const struct nft_ctx
*ctx
, struct nft_set
*set
)
4413 if (WARN_ON(set
->use
> 0))
4416 for (i
= 0; i
< set
->num_exprs
; i
++)
4417 nft_expr_destroy(ctx
, set
->exprs
[i
]);
4419 set
->ops
->destroy(set
);
4424 static int nf_tables_delset(struct net
*net
, struct sock
*nlsk
,
4425 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
4426 const struct nlattr
* const nla
[],
4427 struct netlink_ext_ack
*extack
)
4429 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
4430 u8 genmask
= nft_genmask_next(net
);
4431 const struct nlattr
*attr
;
4432 struct nft_set
*set
;
4436 if (nfmsg
->nfgen_family
== NFPROTO_UNSPEC
)
4437 return -EAFNOSUPPORT
;
4438 if (nla
[NFTA_SET_TABLE
] == NULL
)
4441 err
= nft_ctx_init_from_setattr(&ctx
, net
, skb
, nlh
, nla
, extack
,
4442 genmask
, NETLINK_CB(skb
).portid
);
4446 if (nla
[NFTA_SET_HANDLE
]) {
4447 attr
= nla
[NFTA_SET_HANDLE
];
4448 set
= nft_set_lookup_byhandle(ctx
.table
, attr
, genmask
);
4450 attr
= nla
[NFTA_SET_NAME
];
4451 set
= nft_set_lookup(ctx
.table
, attr
, genmask
);
4455 NL_SET_BAD_ATTR(extack
, attr
);
4456 return PTR_ERR(set
);
4459 (nlh
->nlmsg_flags
& NLM_F_NONREC
&& atomic_read(&set
->nelems
) > 0)) {
4460 NL_SET_BAD_ATTR(extack
, attr
);
4464 return nft_delset(&ctx
, set
);
4467 static int nft_validate_register_store(const struct nft_ctx
*ctx
,
4468 enum nft_registers reg
,
4469 const struct nft_data
*data
,
4470 enum nft_data_types type
,
4473 static int nf_tables_bind_check_setelem(const struct nft_ctx
*ctx
,
4474 struct nft_set
*set
,
4475 const struct nft_set_iter
*iter
,
4476 struct nft_set_elem
*elem
)
4478 const struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
->priv
);
4479 enum nft_registers dreg
;
4481 dreg
= nft_type_to_reg(set
->dtype
);
4482 return nft_validate_register_store(ctx
, dreg
, nft_set_ext_data(ext
),
4483 set
->dtype
== NFT_DATA_VERDICT
?
4484 NFT_DATA_VERDICT
: NFT_DATA_VALUE
,
4488 int nf_tables_bind_set(const struct nft_ctx
*ctx
, struct nft_set
*set
,
4489 struct nft_set_binding
*binding
)
4491 struct nft_set_binding
*i
;
4492 struct nft_set_iter iter
;
4494 if (set
->use
== UINT_MAX
)
4497 if (!list_empty(&set
->bindings
) && nft_set_is_anonymous(set
))
4500 if (binding
->flags
& NFT_SET_MAP
) {
4501 /* If the set is already bound to the same chain all
4502 * jumps are already validated for that chain.
4504 list_for_each_entry(i
, &set
->bindings
, list
) {
4505 if (i
->flags
& NFT_SET_MAP
&&
4506 i
->chain
== binding
->chain
)
4510 iter
.genmask
= nft_genmask_next(ctx
->net
);
4514 iter
.fn
= nf_tables_bind_check_setelem
;
4516 set
->ops
->walk(ctx
, set
, &iter
);
4521 binding
->chain
= ctx
->chain
;
4522 list_add_tail_rcu(&binding
->list
, &set
->bindings
);
4523 nft_set_trans_bind(ctx
, set
);
4528 EXPORT_SYMBOL_GPL(nf_tables_bind_set
);
4530 static void nf_tables_unbind_set(const struct nft_ctx
*ctx
, struct nft_set
*set
,
4531 struct nft_set_binding
*binding
, bool event
)
4533 list_del_rcu(&binding
->list
);
4535 if (list_empty(&set
->bindings
) && nft_set_is_anonymous(set
)) {
4536 list_del_rcu(&set
->list
);
4538 nf_tables_set_notify(ctx
, set
, NFT_MSG_DELSET
,
4543 void nf_tables_deactivate_set(const struct nft_ctx
*ctx
, struct nft_set
*set
,
4544 struct nft_set_binding
*binding
,
4545 enum nft_trans_phase phase
)
4548 case NFT_TRANS_PREPARE
:
4551 case NFT_TRANS_ABORT
:
4552 case NFT_TRANS_RELEASE
:
4556 nf_tables_unbind_set(ctx
, set
, binding
,
4557 phase
== NFT_TRANS_COMMIT
);
4560 EXPORT_SYMBOL_GPL(nf_tables_deactivate_set
);
4562 void nf_tables_destroy_set(const struct nft_ctx
*ctx
, struct nft_set
*set
)
4564 if (list_empty(&set
->bindings
) && nft_set_is_anonymous(set
))
4565 nft_set_destroy(ctx
, set
);
4567 EXPORT_SYMBOL_GPL(nf_tables_destroy_set
);
4569 const struct nft_set_ext_type nft_set_ext_types
[] = {
4570 [NFT_SET_EXT_KEY
] = {
4571 .align
= __alignof__(u32
),
4573 [NFT_SET_EXT_DATA
] = {
4574 .align
= __alignof__(u32
),
4576 [NFT_SET_EXT_EXPRESSIONS
] = {
4577 .align
= __alignof__(struct nft_set_elem_expr
),
4579 [NFT_SET_EXT_OBJREF
] = {
4580 .len
= sizeof(struct nft_object
*),
4581 .align
= __alignof__(struct nft_object
*),
4583 [NFT_SET_EXT_FLAGS
] = {
4585 .align
= __alignof__(u8
),
4587 [NFT_SET_EXT_TIMEOUT
] = {
4589 .align
= __alignof__(u64
),
4591 [NFT_SET_EXT_EXPIRATION
] = {
4593 .align
= __alignof__(u64
),
4595 [NFT_SET_EXT_USERDATA
] = {
4596 .len
= sizeof(struct nft_userdata
),
4597 .align
= __alignof__(struct nft_userdata
),
4599 [NFT_SET_EXT_KEY_END
] = {
4600 .align
= __alignof__(u32
),
4608 static const struct nla_policy nft_set_elem_policy
[NFTA_SET_ELEM_MAX
+ 1] = {
4609 [NFTA_SET_ELEM_KEY
] = { .type
= NLA_NESTED
},
4610 [NFTA_SET_ELEM_DATA
] = { .type
= NLA_NESTED
},
4611 [NFTA_SET_ELEM_FLAGS
] = { .type
= NLA_U32
},
4612 [NFTA_SET_ELEM_TIMEOUT
] = { .type
= NLA_U64
},
4613 [NFTA_SET_ELEM_EXPIRATION
] = { .type
= NLA_U64
},
4614 [NFTA_SET_ELEM_USERDATA
] = { .type
= NLA_BINARY
,
4615 .len
= NFT_USERDATA_MAXLEN
},
4616 [NFTA_SET_ELEM_EXPR
] = { .type
= NLA_NESTED
},
4617 [NFTA_SET_ELEM_OBJREF
] = { .type
= NLA_STRING
,
4618 .len
= NFT_OBJ_MAXNAMELEN
- 1 },
4619 [NFTA_SET_ELEM_KEY_END
] = { .type
= NLA_NESTED
},
4620 [NFTA_SET_ELEM_EXPRESSIONS
] = { .type
= NLA_NESTED
},
4623 static const struct nla_policy nft_set_elem_list_policy
[NFTA_SET_ELEM_LIST_MAX
+ 1] = {
4624 [NFTA_SET_ELEM_LIST_TABLE
] = { .type
= NLA_STRING
,
4625 .len
= NFT_TABLE_MAXNAMELEN
- 1 },
4626 [NFTA_SET_ELEM_LIST_SET
] = { .type
= NLA_STRING
,
4627 .len
= NFT_SET_MAXNAMELEN
- 1 },
4628 [NFTA_SET_ELEM_LIST_ELEMENTS
] = { .type
= NLA_NESTED
},
4629 [NFTA_SET_ELEM_LIST_SET_ID
] = { .type
= NLA_U32
},
4632 static int nft_ctx_init_from_elemattr(struct nft_ctx
*ctx
, struct net
*net
,
4633 const struct sk_buff
*skb
,
4634 const struct nlmsghdr
*nlh
,
4635 const struct nlattr
* const nla
[],
4636 struct netlink_ext_ack
*extack
,
4637 u8 genmask
, u32 nlpid
)
4639 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
4640 int family
= nfmsg
->nfgen_family
;
4641 struct nft_table
*table
;
4643 table
= nft_table_lookup(net
, nla
[NFTA_SET_ELEM_LIST_TABLE
], family
,
4645 if (IS_ERR(table
)) {
4646 NL_SET_BAD_ATTR(extack
, nla
[NFTA_SET_ELEM_LIST_TABLE
]);
4647 return PTR_ERR(table
);
4650 nft_ctx_init(ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
4654 static int nft_set_elem_expr_dump(struct sk_buff
*skb
,
4655 const struct nft_set
*set
,
4656 const struct nft_set_ext
*ext
)
4658 struct nft_set_elem_expr
*elem_expr
;
4659 u32 size
, num_exprs
= 0;
4660 struct nft_expr
*expr
;
4661 struct nlattr
*nest
;
4663 elem_expr
= nft_set_ext_expr(ext
);
4664 nft_setelem_expr_foreach(expr
, elem_expr
, size
)
4667 if (num_exprs
== 1) {
4668 expr
= nft_setelem_expr_at(elem_expr
, 0);
4669 if (nft_expr_dump(skb
, NFTA_SET_ELEM_EXPR
, expr
) < 0)
4673 } else if (num_exprs
> 1) {
4674 nest
= nla_nest_start_noflag(skb
, NFTA_SET_ELEM_EXPRESSIONS
);
4676 goto nla_put_failure
;
4678 nft_setelem_expr_foreach(expr
, elem_expr
, size
) {
4679 expr
= nft_setelem_expr_at(elem_expr
, size
);
4680 if (nft_expr_dump(skb
, NFTA_LIST_ELEM
, expr
) < 0)
4681 goto nla_put_failure
;
4683 nla_nest_end(skb
, nest
);
4691 static int nf_tables_fill_setelem(struct sk_buff
*skb
,
4692 const struct nft_set
*set
,
4693 const struct nft_set_elem
*elem
)
4695 const struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
->priv
);
4696 unsigned char *b
= skb_tail_pointer(skb
);
4697 struct nlattr
*nest
;
4699 nest
= nla_nest_start_noflag(skb
, NFTA_LIST_ELEM
);
4701 goto nla_put_failure
;
4703 if (nft_data_dump(skb
, NFTA_SET_ELEM_KEY
, nft_set_ext_key(ext
),
4704 NFT_DATA_VALUE
, set
->klen
) < 0)
4705 goto nla_put_failure
;
4707 if (nft_set_ext_exists(ext
, NFT_SET_EXT_KEY_END
) &&
4708 nft_data_dump(skb
, NFTA_SET_ELEM_KEY_END
, nft_set_ext_key_end(ext
),
4709 NFT_DATA_VALUE
, set
->klen
) < 0)
4710 goto nla_put_failure
;
4712 if (nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
) &&
4713 nft_data_dump(skb
, NFTA_SET_ELEM_DATA
, nft_set_ext_data(ext
),
4714 set
->dtype
== NFT_DATA_VERDICT
? NFT_DATA_VERDICT
: NFT_DATA_VALUE
,
4716 goto nla_put_failure
;
4718 if (nft_set_ext_exists(ext
, NFT_SET_EXT_EXPRESSIONS
) &&
4719 nft_set_elem_expr_dump(skb
, set
, ext
))
4720 goto nla_put_failure
;
4722 if (nft_set_ext_exists(ext
, NFT_SET_EXT_OBJREF
) &&
4723 nla_put_string(skb
, NFTA_SET_ELEM_OBJREF
,
4724 (*nft_set_ext_obj(ext
))->key
.name
) < 0)
4725 goto nla_put_failure
;
4727 if (nft_set_ext_exists(ext
, NFT_SET_EXT_FLAGS
) &&
4728 nla_put_be32(skb
, NFTA_SET_ELEM_FLAGS
,
4729 htonl(*nft_set_ext_flags(ext
))))
4730 goto nla_put_failure
;
4732 if (nft_set_ext_exists(ext
, NFT_SET_EXT_TIMEOUT
) &&
4733 nla_put_be64(skb
, NFTA_SET_ELEM_TIMEOUT
,
4734 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext
)),
4736 goto nla_put_failure
;
4738 if (nft_set_ext_exists(ext
, NFT_SET_EXT_EXPIRATION
)) {
4739 u64 expires
, now
= get_jiffies_64();
4741 expires
= *nft_set_ext_expiration(ext
);
4742 if (time_before64(now
, expires
))
4747 if (nla_put_be64(skb
, NFTA_SET_ELEM_EXPIRATION
,
4748 nf_jiffies64_to_msecs(expires
),
4750 goto nla_put_failure
;
4753 if (nft_set_ext_exists(ext
, NFT_SET_EXT_USERDATA
)) {
4754 struct nft_userdata
*udata
;
4756 udata
= nft_set_ext_userdata(ext
);
4757 if (nla_put(skb
, NFTA_SET_ELEM_USERDATA
,
4758 udata
->len
+ 1, udata
->data
))
4759 goto nla_put_failure
;
4762 nla_nest_end(skb
, nest
);
4770 struct nft_set_dump_args
{
4771 const struct netlink_callback
*cb
;
4772 struct nft_set_iter iter
;
4773 struct sk_buff
*skb
;
4776 static int nf_tables_dump_setelem(const struct nft_ctx
*ctx
,
4777 struct nft_set
*set
,
4778 const struct nft_set_iter
*iter
,
4779 struct nft_set_elem
*elem
)
4781 struct nft_set_dump_args
*args
;
4783 args
= container_of(iter
, struct nft_set_dump_args
, iter
);
4784 return nf_tables_fill_setelem(args
->skb
, set
, elem
);
4787 struct nft_set_dump_ctx
{
4788 const struct nft_set
*set
;
4792 static int nf_tables_dump_set(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4794 struct nft_set_dump_ctx
*dump_ctx
= cb
->data
;
4795 struct net
*net
= sock_net(skb
->sk
);
4796 struct nft_table
*table
;
4797 struct nft_set
*set
;
4798 struct nft_set_dump_args args
;
4799 bool set_found
= false;
4800 struct nfgenmsg
*nfmsg
;
4801 struct nlmsghdr
*nlh
;
4802 struct nlattr
*nest
;
4807 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
4808 if (dump_ctx
->ctx
.family
!= NFPROTO_UNSPEC
&&
4809 dump_ctx
->ctx
.family
!= table
->family
)
4812 if (table
!= dump_ctx
->ctx
.table
)
4815 list_for_each_entry_rcu(set
, &table
->sets
, list
) {
4816 if (set
== dump_ctx
->set
) {
4829 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, NFT_MSG_NEWSETELEM
);
4830 portid
= NETLINK_CB(cb
->skb
).portid
;
4831 seq
= cb
->nlh
->nlmsg_seq
;
4833 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
),
4836 goto nla_put_failure
;
4838 nfmsg
= nlmsg_data(nlh
);
4839 nfmsg
->nfgen_family
= table
->family
;
4840 nfmsg
->version
= NFNETLINK_V0
;
4841 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
4843 if (nla_put_string(skb
, NFTA_SET_ELEM_LIST_TABLE
, table
->name
))
4844 goto nla_put_failure
;
4845 if (nla_put_string(skb
, NFTA_SET_ELEM_LIST_SET
, set
->name
))
4846 goto nla_put_failure
;
4848 nest
= nla_nest_start_noflag(skb
, NFTA_SET_ELEM_LIST_ELEMENTS
);
4850 goto nla_put_failure
;
4854 args
.iter
.genmask
= nft_genmask_cur(net
);
4855 args
.iter
.skip
= cb
->args
[0];
4856 args
.iter
.count
= 0;
4858 args
.iter
.fn
= nf_tables_dump_setelem
;
4859 set
->ops
->walk(&dump_ctx
->ctx
, set
, &args
.iter
);
4862 nla_nest_end(skb
, nest
);
4863 nlmsg_end(skb
, nlh
);
4865 if (args
.iter
.err
&& args
.iter
.err
!= -EMSGSIZE
)
4866 return args
.iter
.err
;
4867 if (args
.iter
.count
== cb
->args
[0])
4870 cb
->args
[0] = args
.iter
.count
;
4878 static int nf_tables_dump_set_start(struct netlink_callback
*cb
)
4880 struct nft_set_dump_ctx
*dump_ctx
= cb
->data
;
4882 cb
->data
= kmemdup(dump_ctx
, sizeof(*dump_ctx
), GFP_ATOMIC
);
4884 return cb
->data
? 0 : -ENOMEM
;
4887 static int nf_tables_dump_set_done(struct netlink_callback
*cb
)
4893 static int nf_tables_fill_setelem_info(struct sk_buff
*skb
,
4894 const struct nft_ctx
*ctx
, u32 seq
,
4895 u32 portid
, int event
, u16 flags
,
4896 const struct nft_set
*set
,
4897 const struct nft_set_elem
*elem
)
4899 struct nfgenmsg
*nfmsg
;
4900 struct nlmsghdr
*nlh
;
4901 struct nlattr
*nest
;
4904 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
4905 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
),
4908 goto nla_put_failure
;
4910 nfmsg
= nlmsg_data(nlh
);
4911 nfmsg
->nfgen_family
= ctx
->family
;
4912 nfmsg
->version
= NFNETLINK_V0
;
4913 nfmsg
->res_id
= htons(ctx
->net
->nft
.base_seq
& 0xffff);
4915 if (nla_put_string(skb
, NFTA_SET_TABLE
, ctx
->table
->name
))
4916 goto nla_put_failure
;
4917 if (nla_put_string(skb
, NFTA_SET_NAME
, set
->name
))
4918 goto nla_put_failure
;
4920 nest
= nla_nest_start_noflag(skb
, NFTA_SET_ELEM_LIST_ELEMENTS
);
4922 goto nla_put_failure
;
4924 err
= nf_tables_fill_setelem(skb
, set
, elem
);
4926 goto nla_put_failure
;
4928 nla_nest_end(skb
, nest
);
4930 nlmsg_end(skb
, nlh
);
4934 nlmsg_trim(skb
, nlh
);
4938 static int nft_setelem_parse_flags(const struct nft_set
*set
,
4939 const struct nlattr
*attr
, u32
*flags
)
4944 *flags
= ntohl(nla_get_be32(attr
));
4945 if (*flags
& ~NFT_SET_ELEM_INTERVAL_END
)
4947 if (!(set
->flags
& NFT_SET_INTERVAL
) &&
4948 *flags
& NFT_SET_ELEM_INTERVAL_END
)
4954 static int nft_setelem_parse_key(struct nft_ctx
*ctx
, struct nft_set
*set
,
4955 struct nft_data
*key
, struct nlattr
*attr
)
4957 struct nft_data_desc desc
;
4960 err
= nft_data_init(ctx
, key
, NFT_DATA_VALUE_MAXLEN
, &desc
, attr
);
4964 if (desc
.type
!= NFT_DATA_VALUE
|| desc
.len
!= set
->klen
) {
4965 nft_data_release(key
, desc
.type
);
4972 static int nft_setelem_parse_data(struct nft_ctx
*ctx
, struct nft_set
*set
,
4973 struct nft_data_desc
*desc
,
4974 struct nft_data
*data
,
4975 struct nlattr
*attr
)
4979 err
= nft_data_init(ctx
, data
, NFT_DATA_VALUE_MAXLEN
, desc
, attr
);
4983 if (desc
->type
!= NFT_DATA_VERDICT
&& desc
->len
!= set
->dlen
) {
4984 nft_data_release(data
, desc
->type
);
4991 static int nft_get_set_elem(struct nft_ctx
*ctx
, struct nft_set
*set
,
4992 const struct nlattr
*attr
)
4994 struct nlattr
*nla
[NFTA_SET_ELEM_MAX
+ 1];
4995 struct nft_set_elem elem
;
4996 struct sk_buff
*skb
;
5001 err
= nla_parse_nested_deprecated(nla
, NFTA_SET_ELEM_MAX
, attr
,
5002 nft_set_elem_policy
, NULL
);
5006 if (!nla
[NFTA_SET_ELEM_KEY
])
5009 err
= nft_setelem_parse_flags(set
, nla
[NFTA_SET_ELEM_FLAGS
], &flags
);
5013 err
= nft_setelem_parse_key(ctx
, set
, &elem
.key
.val
,
5014 nla
[NFTA_SET_ELEM_KEY
]);
5018 if (nla
[NFTA_SET_ELEM_KEY_END
]) {
5019 err
= nft_setelem_parse_key(ctx
, set
, &elem
.key_end
.val
,
5020 nla
[NFTA_SET_ELEM_KEY_END
]);
5025 priv
= set
->ops
->get(ctx
->net
, set
, &elem
, flags
);
5027 return PTR_ERR(priv
);
5032 skb
= nlmsg_new(NLMSG_GOODSIZE
, GFP_ATOMIC
);
5036 err
= nf_tables_fill_setelem_info(skb
, ctx
, ctx
->seq
, ctx
->portid
,
5037 NFT_MSG_NEWSETELEM
, 0, set
, &elem
);
5039 goto err_fill_setelem
;
5041 return nfnetlink_unicast(skb
, ctx
->net
, ctx
->portid
);
5048 /* called with rcu_read_lock held */
5049 static int nf_tables_getsetelem(struct net
*net
, struct sock
*nlsk
,
5050 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
5051 const struct nlattr
* const nla
[],
5052 struct netlink_ext_ack
*extack
)
5054 u8 genmask
= nft_genmask_cur(net
);
5055 struct nft_set
*set
;
5056 struct nlattr
*attr
;
5060 err
= nft_ctx_init_from_elemattr(&ctx
, net
, skb
, nlh
, nla
, extack
,
5061 genmask
, NETLINK_CB(skb
).portid
);
5065 set
= nft_set_lookup(ctx
.table
, nla
[NFTA_SET_ELEM_LIST_SET
], genmask
);
5067 return PTR_ERR(set
);
5069 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
5070 struct netlink_dump_control c
= {
5071 .start
= nf_tables_dump_set_start
,
5072 .dump
= nf_tables_dump_set
,
5073 .done
= nf_tables_dump_set_done
,
5074 .module
= THIS_MODULE
,
5076 struct nft_set_dump_ctx dump_ctx
= {
5082 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
5085 if (!nla
[NFTA_SET_ELEM_LIST_ELEMENTS
])
5088 nla_for_each_nested(attr
, nla
[NFTA_SET_ELEM_LIST_ELEMENTS
], rem
) {
5089 err
= nft_get_set_elem(&ctx
, set
, attr
);
5097 static void nf_tables_setelem_notify(const struct nft_ctx
*ctx
,
5098 const struct nft_set
*set
,
5099 const struct nft_set_elem
*elem
,
5100 int event
, u16 flags
)
5102 struct net
*net
= ctx
->net
;
5103 u32 portid
= ctx
->portid
;
5104 struct sk_buff
*skb
;
5106 char *buf
= kasprintf(GFP_KERNEL
, "%s:%llu;%s:%llu",
5107 ctx
->table
->name
, ctx
->table
->handle
,
5108 set
->name
, set
->handle
);
5110 audit_log_nfcfg(buf
,
5113 event
== NFT_MSG_NEWSETELEM
?
5114 AUDIT_NFT_OP_SETELEM_REGISTER
:
5115 AUDIT_NFT_OP_SETELEM_UNREGISTER
,
5119 if (!ctx
->report
&& !nfnetlink_has_listeners(net
, NFNLGRP_NFTABLES
))
5122 skb
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
5126 err
= nf_tables_fill_setelem_info(skb
, ctx
, 0, portid
, event
, flags
,
5133 nft_notify_enqueue(skb
, ctx
->report
, &ctx
->net
->nft
.notify_list
);
5136 nfnetlink_set_err(net
, portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
5139 static struct nft_trans
*nft_trans_elem_alloc(struct nft_ctx
*ctx
,
5141 struct nft_set
*set
)
5143 struct nft_trans
*trans
;
5145 trans
= nft_trans_alloc(ctx
, msg_type
, sizeof(struct nft_trans_elem
));
5149 nft_trans_elem_set(trans
) = set
;
5153 struct nft_expr
*nft_set_elem_expr_alloc(const struct nft_ctx
*ctx
,
5154 const struct nft_set
*set
,
5155 const struct nlattr
*attr
)
5157 struct nft_expr
*expr
;
5160 expr
= nft_expr_init(ctx
, attr
);
5165 if (!(expr
->ops
->type
->flags
& NFT_EXPR_STATEFUL
))
5166 goto err_set_elem_expr
;
5168 if (expr
->ops
->type
->flags
& NFT_EXPR_GC
) {
5169 if (set
->flags
& NFT_SET_TIMEOUT
)
5170 goto err_set_elem_expr
;
5171 if (!set
->ops
->gc_init
)
5172 goto err_set_elem_expr
;
5173 set
->ops
->gc_init(set
);
5179 nft_expr_destroy(ctx
, expr
);
5180 return ERR_PTR(err
);
5183 void *nft_set_elem_init(const struct nft_set
*set
,
5184 const struct nft_set_ext_tmpl
*tmpl
,
5185 const u32
*key
, const u32
*key_end
,
5186 const u32
*data
, u64 timeout
, u64 expiration
, gfp_t gfp
)
5188 struct nft_set_ext
*ext
;
5191 elem
= kzalloc(set
->ops
->elemsize
+ tmpl
->len
, gfp
);
5195 ext
= nft_set_elem_ext(set
, elem
);
5196 nft_set_ext_init(ext
, tmpl
);
5198 memcpy(nft_set_ext_key(ext
), key
, set
->klen
);
5199 if (nft_set_ext_exists(ext
, NFT_SET_EXT_KEY_END
))
5200 memcpy(nft_set_ext_key_end(ext
), key_end
, set
->klen
);
5201 if (nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
))
5202 memcpy(nft_set_ext_data(ext
), data
, set
->dlen
);
5203 if (nft_set_ext_exists(ext
, NFT_SET_EXT_EXPIRATION
)) {
5204 *nft_set_ext_expiration(ext
) = get_jiffies_64() + expiration
;
5205 if (expiration
== 0)
5206 *nft_set_ext_expiration(ext
) += timeout
;
5208 if (nft_set_ext_exists(ext
, NFT_SET_EXT_TIMEOUT
))
5209 *nft_set_ext_timeout(ext
) = timeout
;
5214 static void __nft_set_elem_expr_destroy(const struct nft_ctx
*ctx
,
5215 struct nft_expr
*expr
)
5217 if (expr
->ops
->destroy_clone
) {
5218 expr
->ops
->destroy_clone(ctx
, expr
);
5219 module_put(expr
->ops
->type
->owner
);
5221 nf_tables_expr_destroy(ctx
, expr
);
5225 static void nft_set_elem_expr_destroy(const struct nft_ctx
*ctx
,
5226 struct nft_set_elem_expr
*elem_expr
)
5228 struct nft_expr
*expr
;
5231 nft_setelem_expr_foreach(expr
, elem_expr
, size
)
5232 __nft_set_elem_expr_destroy(ctx
, expr
);
5235 void nft_set_elem_destroy(const struct nft_set
*set
, void *elem
,
5238 struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
);
5239 struct nft_ctx ctx
= {
5240 .net
= read_pnet(&set
->net
),
5241 .family
= set
->table
->family
,
5244 nft_data_release(nft_set_ext_key(ext
), NFT_DATA_VALUE
);
5245 if (nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
))
5246 nft_data_release(nft_set_ext_data(ext
), set
->dtype
);
5247 if (destroy_expr
&& nft_set_ext_exists(ext
, NFT_SET_EXT_EXPRESSIONS
))
5248 nft_set_elem_expr_destroy(&ctx
, nft_set_ext_expr(ext
));
5250 if (nft_set_ext_exists(ext
, NFT_SET_EXT_OBJREF
))
5251 (*nft_set_ext_obj(ext
))->use
--;
5254 EXPORT_SYMBOL_GPL(nft_set_elem_destroy
);
5256 /* Only called from commit path, nft_set_elem_deactivate() already deals with
5257 * the refcounting from the preparation phase.
5259 static void nf_tables_set_elem_destroy(const struct nft_ctx
*ctx
,
5260 const struct nft_set
*set
, void *elem
)
5262 struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
);
5264 if (nft_set_ext_exists(ext
, NFT_SET_EXT_EXPRESSIONS
))
5265 nft_set_elem_expr_destroy(ctx
, nft_set_ext_expr(ext
));
5270 int nft_set_elem_expr_clone(const struct nft_ctx
*ctx
, struct nft_set
*set
,
5271 struct nft_expr
*expr_array
[])
5273 struct nft_expr
*expr
;
5276 for (i
= 0; i
< set
->num_exprs
; i
++) {
5277 expr
= kzalloc(set
->exprs
[i
]->ops
->size
, GFP_KERNEL
);
5281 err
= nft_expr_clone(expr
, set
->exprs
[i
]);
5283 nft_expr_destroy(ctx
, expr
);
5286 expr_array
[i
] = expr
;
5292 for (k
= i
- 1; k
>= 0; k
--)
5293 nft_expr_destroy(ctx
, expr_array
[k
]);
5298 static void nft_set_elem_expr_setup(const struct nft_set_ext
*ext
, int i
,
5299 struct nft_expr
*expr_array
[])
5301 struct nft_set_elem_expr
*elem_expr
= nft_set_ext_expr(ext
);
5302 struct nft_expr
*expr
= nft_setelem_expr_at(elem_expr
, elem_expr
->size
);
5304 memcpy(expr
, expr_array
[i
], expr_array
[i
]->ops
->size
);
5305 elem_expr
->size
+= expr_array
[i
]->ops
->size
;
5306 kfree(expr_array
[i
]);
5307 expr_array
[i
] = NULL
;
5310 static int nft_add_set_elem(struct nft_ctx
*ctx
, struct nft_set
*set
,
5311 const struct nlattr
*attr
, u32 nlmsg_flags
)
5313 struct nft_expr
*expr_array
[NFT_SET_EXPR_MAX
] = {};
5314 struct nlattr
*nla
[NFTA_SET_ELEM_MAX
+ 1];
5315 u8 genmask
= nft_genmask_next(ctx
->net
);
5316 u32 flags
= 0, size
= 0, num_exprs
= 0;
5317 struct nft_set_ext_tmpl tmpl
;
5318 struct nft_set_ext
*ext
, *ext2
;
5319 struct nft_set_elem elem
;
5320 struct nft_set_binding
*binding
;
5321 struct nft_object
*obj
= NULL
;
5322 struct nft_userdata
*udata
;
5323 struct nft_data_desc desc
;
5324 enum nft_registers dreg
;
5325 struct nft_trans
*trans
;
5331 err
= nla_parse_nested_deprecated(nla
, NFTA_SET_ELEM_MAX
, attr
,
5332 nft_set_elem_policy
, NULL
);
5336 if (nla
[NFTA_SET_ELEM_KEY
] == NULL
)
5339 nft_set_ext_prepare(&tmpl
);
5341 err
= nft_setelem_parse_flags(set
, nla
[NFTA_SET_ELEM_FLAGS
], &flags
);
5345 nft_set_ext_add(&tmpl
, NFT_SET_EXT_FLAGS
);
5347 if (set
->flags
& NFT_SET_MAP
) {
5348 if (nla
[NFTA_SET_ELEM_DATA
] == NULL
&&
5349 !(flags
& NFT_SET_ELEM_INTERVAL_END
))
5352 if (nla
[NFTA_SET_ELEM_DATA
] != NULL
)
5356 if ((flags
& NFT_SET_ELEM_INTERVAL_END
) &&
5357 (nla
[NFTA_SET_ELEM_DATA
] ||
5358 nla
[NFTA_SET_ELEM_OBJREF
] ||
5359 nla
[NFTA_SET_ELEM_TIMEOUT
] ||
5360 nla
[NFTA_SET_ELEM_EXPIRATION
] ||
5361 nla
[NFTA_SET_ELEM_USERDATA
] ||
5362 nla
[NFTA_SET_ELEM_EXPR
] ||
5363 nla
[NFTA_SET_ELEM_EXPRESSIONS
]))
5367 if (nla
[NFTA_SET_ELEM_TIMEOUT
] != NULL
) {
5368 if (!(set
->flags
& NFT_SET_TIMEOUT
))
5370 err
= nf_msecs_to_jiffies64(nla
[NFTA_SET_ELEM_TIMEOUT
],
5374 } else if (set
->flags
& NFT_SET_TIMEOUT
) {
5375 timeout
= set
->timeout
;
5379 if (nla
[NFTA_SET_ELEM_EXPIRATION
] != NULL
) {
5380 if (!(set
->flags
& NFT_SET_TIMEOUT
))
5382 err
= nf_msecs_to_jiffies64(nla
[NFTA_SET_ELEM_EXPIRATION
],
5388 if (nla
[NFTA_SET_ELEM_EXPR
]) {
5389 struct nft_expr
*expr
;
5391 if (set
->num_exprs
&& set
->num_exprs
!= 1)
5394 expr
= nft_set_elem_expr_alloc(ctx
, set
,
5395 nla
[NFTA_SET_ELEM_EXPR
]);
5397 return PTR_ERR(expr
);
5399 expr_array
[0] = expr
;
5402 if (set
->num_exprs
&& set
->exprs
[0]->ops
!= expr
->ops
) {
5404 goto err_set_elem_expr
;
5406 } else if (nla
[NFTA_SET_ELEM_EXPRESSIONS
]) {
5407 struct nft_expr
*expr
;
5412 nla_for_each_nested(tmp
, nla
[NFTA_SET_ELEM_EXPRESSIONS
], left
) {
5413 if (i
== NFT_SET_EXPR_MAX
||
5414 (set
->num_exprs
&& set
->num_exprs
== i
)) {
5416 goto err_set_elem_expr
;
5418 if (nla_type(tmp
) != NFTA_LIST_ELEM
) {
5420 goto err_set_elem_expr
;
5422 expr
= nft_set_elem_expr_alloc(ctx
, set
, tmp
);
5424 err
= PTR_ERR(expr
);
5425 goto err_set_elem_expr
;
5427 expr_array
[i
] = expr
;
5430 if (set
->num_exprs
&& expr
->ops
!= set
->exprs
[i
]->ops
) {
5432 goto err_set_elem_expr
;
5436 if (set
->num_exprs
&& set
->num_exprs
!= i
) {
5438 goto err_set_elem_expr
;
5440 } else if (set
->num_exprs
> 0) {
5441 err
= nft_set_elem_expr_clone(ctx
, set
, expr_array
);
5443 goto err_set_elem_expr_clone
;
5445 num_exprs
= set
->num_exprs
;
5448 err
= nft_setelem_parse_key(ctx
, set
, &elem
.key
.val
,
5449 nla
[NFTA_SET_ELEM_KEY
]);
5451 goto err_set_elem_expr
;
5453 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_KEY
, set
->klen
);
5455 if (nla
[NFTA_SET_ELEM_KEY_END
]) {
5456 err
= nft_setelem_parse_key(ctx
, set
, &elem
.key_end
.val
,
5457 nla
[NFTA_SET_ELEM_KEY_END
]);
5461 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_KEY_END
, set
->klen
);
5465 nft_set_ext_add(&tmpl
, NFT_SET_EXT_EXPIRATION
);
5466 if (timeout
!= set
->timeout
)
5467 nft_set_ext_add(&tmpl
, NFT_SET_EXT_TIMEOUT
);
5471 for (i
= 0; i
< num_exprs
; i
++)
5472 size
+= expr_array
[i
]->ops
->size
;
5474 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_EXPRESSIONS
,
5475 sizeof(struct nft_set_elem_expr
) +
5479 if (nla
[NFTA_SET_ELEM_OBJREF
] != NULL
) {
5480 if (!(set
->flags
& NFT_SET_OBJECT
)) {
5482 goto err_parse_key_end
;
5484 obj
= nft_obj_lookup(ctx
->net
, ctx
->table
,
5485 nla
[NFTA_SET_ELEM_OBJREF
],
5486 set
->objtype
, genmask
);
5489 goto err_parse_key_end
;
5491 nft_set_ext_add(&tmpl
, NFT_SET_EXT_OBJREF
);
5494 if (nla
[NFTA_SET_ELEM_DATA
] != NULL
) {
5495 err
= nft_setelem_parse_data(ctx
, set
, &desc
, &elem
.data
.val
,
5496 nla
[NFTA_SET_ELEM_DATA
]);
5498 goto err_parse_key_end
;
5500 dreg
= nft_type_to_reg(set
->dtype
);
5501 list_for_each_entry(binding
, &set
->bindings
, list
) {
5502 struct nft_ctx bind_ctx
= {
5504 .family
= ctx
->family
,
5505 .table
= ctx
->table
,
5506 .chain
= (struct nft_chain
*)binding
->chain
,
5509 if (!(binding
->flags
& NFT_SET_MAP
))
5512 err
= nft_validate_register_store(&bind_ctx
, dreg
,
5514 desc
.type
, desc
.len
);
5516 goto err_parse_data
;
5518 if (desc
.type
== NFT_DATA_VERDICT
&&
5519 (elem
.data
.val
.verdict
.code
== NFT_GOTO
||
5520 elem
.data
.val
.verdict
.code
== NFT_JUMP
))
5521 nft_validate_state_update(ctx
->net
,
5525 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_DATA
, desc
.len
);
5528 /* The full maximum length of userdata can exceed the maximum
5529 * offset value (U8_MAX) for following extensions, therefor it
5530 * must be the last extension added.
5533 if (nla
[NFTA_SET_ELEM_USERDATA
] != NULL
) {
5534 ulen
= nla_len(nla
[NFTA_SET_ELEM_USERDATA
]);
5536 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_USERDATA
,
5541 elem
.priv
= nft_set_elem_init(set
, &tmpl
, elem
.key
.val
.data
,
5542 elem
.key_end
.val
.data
, elem
.data
.val
.data
,
5543 timeout
, expiration
, GFP_KERNEL
);
5544 if (elem
.priv
== NULL
)
5545 goto err_parse_data
;
5547 ext
= nft_set_elem_ext(set
, elem
.priv
);
5549 *nft_set_ext_flags(ext
) = flags
;
5551 udata
= nft_set_ext_userdata(ext
);
5552 udata
->len
= ulen
- 1;
5553 nla_memcpy(&udata
->data
, nla
[NFTA_SET_ELEM_USERDATA
], ulen
);
5556 *nft_set_ext_obj(ext
) = obj
;
5559 for (i
= 0; i
< num_exprs
; i
++)
5560 nft_set_elem_expr_setup(ext
, i
, expr_array
);
5562 trans
= nft_trans_elem_alloc(ctx
, NFT_MSG_NEWSETELEM
, set
);
5566 ext
->genmask
= nft_genmask_cur(ctx
->net
) | NFT_SET_ELEM_BUSY_MASK
;
5567 err
= set
->ops
->insert(ctx
->net
, set
, &elem
, &ext2
);
5569 if (err
== -EEXIST
) {
5570 if (nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
) ^
5571 nft_set_ext_exists(ext2
, NFT_SET_EXT_DATA
) ||
5572 nft_set_ext_exists(ext
, NFT_SET_EXT_OBJREF
) ^
5573 nft_set_ext_exists(ext2
, NFT_SET_EXT_OBJREF
))
5574 goto err_element_clash
;
5575 if ((nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
) &&
5576 nft_set_ext_exists(ext2
, NFT_SET_EXT_DATA
) &&
5577 memcmp(nft_set_ext_data(ext
),
5578 nft_set_ext_data(ext2
), set
->dlen
) != 0) ||
5579 (nft_set_ext_exists(ext
, NFT_SET_EXT_OBJREF
) &&
5580 nft_set_ext_exists(ext2
, NFT_SET_EXT_OBJREF
) &&
5581 *nft_set_ext_obj(ext
) != *nft_set_ext_obj(ext2
)))
5582 goto err_element_clash
;
5583 else if (!(nlmsg_flags
& NLM_F_EXCL
))
5585 } else if (err
== -ENOTEMPTY
) {
5586 /* ENOTEMPTY reports overlapping between this element
5587 * and an existing one.
5591 goto err_element_clash
;
5595 !atomic_add_unless(&set
->nelems
, 1, set
->size
+ set
->ndeact
)) {
5600 nft_trans_elem(trans
) = elem
;
5601 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
5605 set
->ops
->remove(ctx
->net
, set
, &elem
);
5612 nf_tables_set_elem_destroy(ctx
, set
, elem
.priv
);
5614 if (nla
[NFTA_SET_ELEM_DATA
] != NULL
)
5615 nft_data_release(&elem
.data
.val
, desc
.type
);
5617 nft_data_release(&elem
.key_end
.val
, NFT_DATA_VALUE
);
5619 nft_data_release(&elem
.key
.val
, NFT_DATA_VALUE
);
5621 for (i
= 0; i
< num_exprs
&& expr_array
[i
]; i
++)
5622 nft_expr_destroy(ctx
, expr_array
[i
]);
5623 err_set_elem_expr_clone
:
5627 static int nf_tables_newsetelem(struct net
*net
, struct sock
*nlsk
,
5628 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
5629 const struct nlattr
* const nla
[],
5630 struct netlink_ext_ack
*extack
)
5632 u8 genmask
= nft_genmask_next(net
);
5633 const struct nlattr
*attr
;
5634 struct nft_set
*set
;
5638 if (nla
[NFTA_SET_ELEM_LIST_ELEMENTS
] == NULL
)
5641 err
= nft_ctx_init_from_elemattr(&ctx
, net
, skb
, nlh
, nla
, extack
,
5642 genmask
, NETLINK_CB(skb
).portid
);
5646 set
= nft_set_lookup_global(net
, ctx
.table
, nla
[NFTA_SET_ELEM_LIST_SET
],
5647 nla
[NFTA_SET_ELEM_LIST_SET_ID
], genmask
);
5649 return PTR_ERR(set
);
5651 if (!list_empty(&set
->bindings
) && set
->flags
& NFT_SET_CONSTANT
)
5654 nla_for_each_nested(attr
, nla
[NFTA_SET_ELEM_LIST_ELEMENTS
], rem
) {
5655 err
= nft_add_set_elem(&ctx
, set
, attr
, nlh
->nlmsg_flags
);
5660 if (net
->nft
.validate_state
== NFT_VALIDATE_DO
)
5661 return nft_table_validate(net
, ctx
.table
);
5667 * nft_data_hold - hold a nft_data item
5669 * @data: struct nft_data to release
5670 * @type: type of data
5672 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
5673 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
5674 * NFT_GOTO verdicts. This function must be called on active data objects
5675 * from the second phase of the commit protocol.
5677 void nft_data_hold(const struct nft_data
*data
, enum nft_data_types type
)
5679 struct nft_chain
*chain
;
5680 struct nft_rule
*rule
;
5682 if (type
== NFT_DATA_VERDICT
) {
5683 switch (data
->verdict
.code
) {
5686 chain
= data
->verdict
.chain
;
5689 if (!nft_chain_is_bound(chain
))
5692 chain
->table
->use
++;
5693 list_for_each_entry(rule
, &chain
->rules
, list
)
5696 nft_chain_add(chain
->table
, chain
);
5702 static void nft_set_elem_activate(const struct net
*net
,
5703 const struct nft_set
*set
,
5704 struct nft_set_elem
*elem
)
5706 const struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
->priv
);
5708 if (nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
))
5709 nft_data_hold(nft_set_ext_data(ext
), set
->dtype
);
5710 if (nft_set_ext_exists(ext
, NFT_SET_EXT_OBJREF
))
5711 (*nft_set_ext_obj(ext
))->use
++;
5714 static void nft_set_elem_deactivate(const struct net
*net
,
5715 const struct nft_set
*set
,
5716 struct nft_set_elem
*elem
)
5718 const struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
->priv
);
5720 if (nft_set_ext_exists(ext
, NFT_SET_EXT_DATA
))
5721 nft_data_release(nft_set_ext_data(ext
), set
->dtype
);
5722 if (nft_set_ext_exists(ext
, NFT_SET_EXT_OBJREF
))
5723 (*nft_set_ext_obj(ext
))->use
--;
5726 static int nft_del_setelem(struct nft_ctx
*ctx
, struct nft_set
*set
,
5727 const struct nlattr
*attr
)
5729 struct nlattr
*nla
[NFTA_SET_ELEM_MAX
+ 1];
5730 struct nft_set_ext_tmpl tmpl
;
5731 struct nft_set_elem elem
;
5732 struct nft_set_ext
*ext
;
5733 struct nft_trans
*trans
;
5738 err
= nla_parse_nested_deprecated(nla
, NFTA_SET_ELEM_MAX
, attr
,
5739 nft_set_elem_policy
, NULL
);
5743 if (nla
[NFTA_SET_ELEM_KEY
] == NULL
)
5746 nft_set_ext_prepare(&tmpl
);
5748 err
= nft_setelem_parse_flags(set
, nla
[NFTA_SET_ELEM_FLAGS
], &flags
);
5752 nft_set_ext_add(&tmpl
, NFT_SET_EXT_FLAGS
);
5754 err
= nft_setelem_parse_key(ctx
, set
, &elem
.key
.val
,
5755 nla
[NFTA_SET_ELEM_KEY
]);
5759 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_KEY
, set
->klen
);
5761 if (nla
[NFTA_SET_ELEM_KEY_END
]) {
5762 err
= nft_setelem_parse_key(ctx
, set
, &elem
.key_end
.val
,
5763 nla
[NFTA_SET_ELEM_KEY_END
]);
5767 nft_set_ext_add_length(&tmpl
, NFT_SET_EXT_KEY_END
, set
->klen
);
5771 elem
.priv
= nft_set_elem_init(set
, &tmpl
, elem
.key
.val
.data
,
5772 elem
.key_end
.val
.data
, NULL
, 0, 0,
5774 if (elem
.priv
== NULL
)
5777 ext
= nft_set_elem_ext(set
, elem
.priv
);
5779 *nft_set_ext_flags(ext
) = flags
;
5781 trans
= nft_trans_elem_alloc(ctx
, NFT_MSG_DELSETELEM
, set
);
5785 priv
= set
->ops
->deactivate(ctx
->net
, set
, &elem
);
5793 nft_set_elem_deactivate(ctx
->net
, set
, &elem
);
5795 nft_trans_elem(trans
) = elem
;
5796 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
5804 nft_data_release(&elem
.key
.val
, NFT_DATA_VALUE
);
5808 static int nft_flush_set(const struct nft_ctx
*ctx
,
5809 struct nft_set
*set
,
5810 const struct nft_set_iter
*iter
,
5811 struct nft_set_elem
*elem
)
5813 struct nft_trans
*trans
;
5816 trans
= nft_trans_alloc_gfp(ctx
, NFT_MSG_DELSETELEM
,
5817 sizeof(struct nft_trans_elem
), GFP_ATOMIC
);
5821 if (!set
->ops
->flush(ctx
->net
, set
, elem
->priv
)) {
5827 nft_set_elem_deactivate(ctx
->net
, set
, elem
);
5828 nft_trans_elem_set(trans
) = set
;
5829 nft_trans_elem(trans
) = *elem
;
5830 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
5838 static int nf_tables_delsetelem(struct net
*net
, struct sock
*nlsk
,
5839 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
5840 const struct nlattr
* const nla
[],
5841 struct netlink_ext_ack
*extack
)
5843 u8 genmask
= nft_genmask_next(net
);
5844 const struct nlattr
*attr
;
5845 struct nft_set
*set
;
5849 err
= nft_ctx_init_from_elemattr(&ctx
, net
, skb
, nlh
, nla
, extack
,
5850 genmask
, NETLINK_CB(skb
).portid
);
5854 set
= nft_set_lookup(ctx
.table
, nla
[NFTA_SET_ELEM_LIST_SET
], genmask
);
5856 return PTR_ERR(set
);
5857 if (!list_empty(&set
->bindings
) && set
->flags
& NFT_SET_CONSTANT
)
5860 if (nla
[NFTA_SET_ELEM_LIST_ELEMENTS
] == NULL
) {
5861 struct nft_set_iter iter
= {
5863 .fn
= nft_flush_set
,
5865 set
->ops
->walk(&ctx
, set
, &iter
);
5870 nla_for_each_nested(attr
, nla
[NFTA_SET_ELEM_LIST_ELEMENTS
], rem
) {
5871 err
= nft_del_setelem(&ctx
, set
, attr
);
5880 void nft_set_gc_batch_release(struct rcu_head
*rcu
)
5882 struct nft_set_gc_batch
*gcb
;
5885 gcb
= container_of(rcu
, struct nft_set_gc_batch
, head
.rcu
);
5886 for (i
= 0; i
< gcb
->head
.cnt
; i
++)
5887 nft_set_elem_destroy(gcb
->head
.set
, gcb
->elems
[i
], true);
5891 struct nft_set_gc_batch
*nft_set_gc_batch_alloc(const struct nft_set
*set
,
5894 struct nft_set_gc_batch
*gcb
;
5896 gcb
= kzalloc(sizeof(*gcb
), gfp
);
5899 gcb
->head
.set
= set
;
5908 * nft_register_obj- register nf_tables stateful object type
5909 * @obj_type: object type
5911 * Registers the object type for use with nf_tables. Returns zero on
5912 * success or a negative errno code otherwise.
5914 int nft_register_obj(struct nft_object_type
*obj_type
)
5916 if (obj_type
->type
== NFT_OBJECT_UNSPEC
)
5919 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
5920 list_add_rcu(&obj_type
->list
, &nf_tables_objects
);
5921 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
5924 EXPORT_SYMBOL_GPL(nft_register_obj
);
5927 * nft_unregister_obj - unregister nf_tables object type
5928 * @obj_type: object type
5930 * Unregisters the object type for use with nf_tables.
5932 void nft_unregister_obj(struct nft_object_type
*obj_type
)
5934 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
5935 list_del_rcu(&obj_type
->list
);
5936 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
5938 EXPORT_SYMBOL_GPL(nft_unregister_obj
);
5940 struct nft_object
*nft_obj_lookup(const struct net
*net
,
5941 const struct nft_table
*table
,
5942 const struct nlattr
*nla
, u32 objtype
,
5945 struct nft_object_hash_key k
= { .table
= table
};
5946 char search
[NFT_OBJ_MAXNAMELEN
];
5947 struct rhlist_head
*tmp
, *list
;
5948 struct nft_object
*obj
;
5950 nla_strscpy(search
, nla
, sizeof(search
));
5953 WARN_ON_ONCE(!rcu_read_lock_held() &&
5954 !lockdep_commit_lock_is_held(net
));
5957 list
= rhltable_lookup(&nft_objname_ht
, &k
, nft_objname_ht_params
);
5961 rhl_for_each_entry_rcu(obj
, tmp
, list
, rhlhead
) {
5962 if (objtype
== obj
->ops
->type
->type
&&
5963 nft_active_genmask(obj
, genmask
)) {
5970 return ERR_PTR(-ENOENT
);
5972 EXPORT_SYMBOL_GPL(nft_obj_lookup
);
5974 static struct nft_object
*nft_obj_lookup_byhandle(const struct nft_table
*table
,
5975 const struct nlattr
*nla
,
5976 u32 objtype
, u8 genmask
)
5978 struct nft_object
*obj
;
5980 list_for_each_entry(obj
, &table
->objects
, list
) {
5981 if (be64_to_cpu(nla_get_be64(nla
)) == obj
->handle
&&
5982 objtype
== obj
->ops
->type
->type
&&
5983 nft_active_genmask(obj
, genmask
))
5986 return ERR_PTR(-ENOENT
);
5989 static const struct nla_policy nft_obj_policy
[NFTA_OBJ_MAX
+ 1] = {
5990 [NFTA_OBJ_TABLE
] = { .type
= NLA_STRING
,
5991 .len
= NFT_TABLE_MAXNAMELEN
- 1 },
5992 [NFTA_OBJ_NAME
] = { .type
= NLA_STRING
,
5993 .len
= NFT_OBJ_MAXNAMELEN
- 1 },
5994 [NFTA_OBJ_TYPE
] = { .type
= NLA_U32
},
5995 [NFTA_OBJ_DATA
] = { .type
= NLA_NESTED
},
5996 [NFTA_OBJ_HANDLE
] = { .type
= NLA_U64
},
5997 [NFTA_OBJ_USERDATA
] = { .type
= NLA_BINARY
,
5998 .len
= NFT_USERDATA_MAXLEN
},
6001 static struct nft_object
*nft_obj_init(const struct nft_ctx
*ctx
,
6002 const struct nft_object_type
*type
,
6003 const struct nlattr
*attr
)
6006 const struct nft_object_ops
*ops
;
6007 struct nft_object
*obj
;
6010 tb
= kmalloc_array(type
->maxattr
+ 1, sizeof(*tb
), GFP_KERNEL
);
6015 err
= nla_parse_nested_deprecated(tb
, type
->maxattr
, attr
,
6016 type
->policy
, NULL
);
6020 memset(tb
, 0, sizeof(tb
[0]) * (type
->maxattr
+ 1));
6023 if (type
->select_ops
) {
6024 ops
= type
->select_ops(ctx
, (const struct nlattr
* const *)tb
);
6034 obj
= kzalloc(sizeof(*obj
) + ops
->size
, GFP_KERNEL
);
6038 err
= ops
->init(ctx
, (const struct nlattr
* const *)tb
, obj
);
6051 return ERR_PTR(err
);
6054 static int nft_object_dump(struct sk_buff
*skb
, unsigned int attr
,
6055 struct nft_object
*obj
, bool reset
)
6057 struct nlattr
*nest
;
6059 nest
= nla_nest_start_noflag(skb
, attr
);
6061 goto nla_put_failure
;
6062 if (obj
->ops
->dump(skb
, obj
, reset
) < 0)
6063 goto nla_put_failure
;
6064 nla_nest_end(skb
, nest
);
6071 static const struct nft_object_type
*__nft_obj_type_get(u32 objtype
)
6073 const struct nft_object_type
*type
;
6075 list_for_each_entry(type
, &nf_tables_objects
, list
) {
6076 if (objtype
== type
->type
)
6082 static const struct nft_object_type
*
6083 nft_obj_type_get(struct net
*net
, u32 objtype
)
6085 const struct nft_object_type
*type
;
6087 type
= __nft_obj_type_get(objtype
);
6088 if (type
!= NULL
&& try_module_get(type
->owner
))
6091 lockdep_nfnl_nft_mutex_not_held();
6092 #ifdef CONFIG_MODULES
6094 if (nft_request_module(net
, "nft-obj-%u", objtype
) == -EAGAIN
)
6095 return ERR_PTR(-EAGAIN
);
6098 return ERR_PTR(-ENOENT
);
6101 static int nf_tables_updobj(const struct nft_ctx
*ctx
,
6102 const struct nft_object_type
*type
,
6103 const struct nlattr
*attr
,
6104 struct nft_object
*obj
)
6106 struct nft_object
*newobj
;
6107 struct nft_trans
*trans
;
6110 trans
= nft_trans_alloc(ctx
, NFT_MSG_NEWOBJ
,
6111 sizeof(struct nft_trans_obj
));
6115 newobj
= nft_obj_init(ctx
, type
, attr
);
6116 if (IS_ERR(newobj
)) {
6117 err
= PTR_ERR(newobj
);
6118 goto err_free_trans
;
6121 nft_trans_obj(trans
) = obj
;
6122 nft_trans_obj_update(trans
) = true;
6123 nft_trans_obj_newobj(trans
) = newobj
;
6124 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
6133 static int nf_tables_newobj(struct net
*net
, struct sock
*nlsk
,
6134 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
6135 const struct nlattr
* const nla
[],
6136 struct netlink_ext_ack
*extack
)
6138 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
6139 const struct nft_object_type
*type
;
6140 u8 genmask
= nft_genmask_next(net
);
6141 int family
= nfmsg
->nfgen_family
;
6142 struct nft_table
*table
;
6143 struct nft_object
*obj
;
6148 if (!nla
[NFTA_OBJ_TYPE
] ||
6149 !nla
[NFTA_OBJ_NAME
] ||
6150 !nla
[NFTA_OBJ_DATA
])
6153 table
= nft_table_lookup(net
, nla
[NFTA_OBJ_TABLE
], family
, genmask
,
6154 NETLINK_CB(skb
).portid
);
6155 if (IS_ERR(table
)) {
6156 NL_SET_BAD_ATTR(extack
, nla
[NFTA_OBJ_TABLE
]);
6157 return PTR_ERR(table
);
6160 objtype
= ntohl(nla_get_be32(nla
[NFTA_OBJ_TYPE
]));
6161 obj
= nft_obj_lookup(net
, table
, nla
[NFTA_OBJ_NAME
], objtype
, genmask
);
6164 if (err
!= -ENOENT
) {
6165 NL_SET_BAD_ATTR(extack
, nla
[NFTA_OBJ_NAME
]);
6169 if (nlh
->nlmsg_flags
& NLM_F_EXCL
) {
6170 NL_SET_BAD_ATTR(extack
, nla
[NFTA_OBJ_NAME
]);
6173 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
6176 type
= __nft_obj_type_get(objtype
);
6177 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
6179 return nf_tables_updobj(&ctx
, type
, nla
[NFTA_OBJ_DATA
], obj
);
6182 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
6184 type
= nft_obj_type_get(net
, objtype
);
6186 return PTR_ERR(type
);
6188 obj
= nft_obj_init(&ctx
, type
, nla
[NFTA_OBJ_DATA
]);
6193 obj
->key
.table
= table
;
6194 obj
->handle
= nf_tables_alloc_handle(table
);
6196 obj
->key
.name
= nla_strdup(nla
[NFTA_OBJ_NAME
], GFP_KERNEL
);
6197 if (!obj
->key
.name
) {
6202 if (nla
[NFTA_OBJ_USERDATA
]) {
6203 obj
->udata
= nla_memdup(nla
[NFTA_OBJ_USERDATA
], GFP_KERNEL
);
6204 if (obj
->udata
== NULL
)
6207 obj
->udlen
= nla_len(nla
[NFTA_OBJ_USERDATA
]);
6210 err
= nft_trans_obj_add(&ctx
, NFT_MSG_NEWOBJ
, obj
);
6214 err
= rhltable_insert(&nft_objname_ht
, &obj
->rhlhead
,
6215 nft_objname_ht_params
);
6219 list_add_tail_rcu(&obj
->list
, &table
->objects
);
6223 /* queued in transaction log */
6224 INIT_LIST_HEAD(&obj
->list
);
6227 kfree(obj
->key
.name
);
6231 if (obj
->ops
->destroy
)
6232 obj
->ops
->destroy(&ctx
, obj
);
6235 module_put(type
->owner
);
6239 static int nf_tables_fill_obj_info(struct sk_buff
*skb
, struct net
*net
,
6240 u32 portid
, u32 seq
, int event
, u32 flags
,
6241 int family
, const struct nft_table
*table
,
6242 struct nft_object
*obj
, bool reset
)
6244 struct nfgenmsg
*nfmsg
;
6245 struct nlmsghdr
*nlh
;
6247 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
6248 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
), flags
);
6250 goto nla_put_failure
;
6252 nfmsg
= nlmsg_data(nlh
);
6253 nfmsg
->nfgen_family
= family
;
6254 nfmsg
->version
= NFNETLINK_V0
;
6255 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
6257 if (nla_put_string(skb
, NFTA_OBJ_TABLE
, table
->name
) ||
6258 nla_put_string(skb
, NFTA_OBJ_NAME
, obj
->key
.name
) ||
6259 nla_put_be32(skb
, NFTA_OBJ_TYPE
, htonl(obj
->ops
->type
->type
)) ||
6260 nla_put_be32(skb
, NFTA_OBJ_USE
, htonl(obj
->use
)) ||
6261 nft_object_dump(skb
, NFTA_OBJ_DATA
, obj
, reset
) ||
6262 nla_put_be64(skb
, NFTA_OBJ_HANDLE
, cpu_to_be64(obj
->handle
),
6264 goto nla_put_failure
;
6267 nla_put(skb
, NFTA_OBJ_USERDATA
, obj
->udlen
, obj
->udata
))
6268 goto nla_put_failure
;
6270 nlmsg_end(skb
, nlh
);
6274 nlmsg_trim(skb
, nlh
);
6278 struct nft_obj_filter
{
6283 static int nf_tables_dump_obj(struct sk_buff
*skb
, struct netlink_callback
*cb
)
6285 const struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
6286 const struct nft_table
*table
;
6287 unsigned int idx
= 0, s_idx
= cb
->args
[0];
6288 struct nft_obj_filter
*filter
= cb
->data
;
6289 struct net
*net
= sock_net(skb
->sk
);
6290 int family
= nfmsg
->nfgen_family
;
6291 struct nft_object
*obj
;
6294 if (NFNL_MSG_TYPE(cb
->nlh
->nlmsg_type
) == NFT_MSG_GETOBJ_RESET
)
6298 cb
->seq
= net
->nft
.base_seq
;
6300 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
6301 if (family
!= NFPROTO_UNSPEC
&& family
!= table
->family
)
6304 list_for_each_entry_rcu(obj
, &table
->objects
, list
) {
6305 if (!nft_is_active(net
, obj
))
6310 memset(&cb
->args
[1], 0,
6311 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
6312 if (filter
&& filter
->table
&&
6313 strcmp(filter
->table
, table
->name
))
6316 filter
->type
!= NFT_OBJECT_UNSPEC
&&
6317 obj
->ops
->type
->type
!= filter
->type
)
6321 char *buf
= kasprintf(GFP_ATOMIC
,
6326 audit_log_nfcfg(buf
,
6329 AUDIT_NFT_OP_OBJ_RESET
,
6334 if (nf_tables_fill_obj_info(skb
, net
, NETLINK_CB(cb
->skb
).portid
,
6337 NLM_F_MULTI
| NLM_F_APPEND
,
6338 table
->family
, table
,
6342 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
6354 static int nf_tables_dump_obj_start(struct netlink_callback
*cb
)
6356 const struct nlattr
* const *nla
= cb
->data
;
6357 struct nft_obj_filter
*filter
= NULL
;
6359 if (nla
[NFTA_OBJ_TABLE
] || nla
[NFTA_OBJ_TYPE
]) {
6360 filter
= kzalloc(sizeof(*filter
), GFP_ATOMIC
);
6364 if (nla
[NFTA_OBJ_TABLE
]) {
6365 filter
->table
= nla_strdup(nla
[NFTA_OBJ_TABLE
], GFP_ATOMIC
);
6366 if (!filter
->table
) {
6372 if (nla
[NFTA_OBJ_TYPE
])
6373 filter
->type
= ntohl(nla_get_be32(nla
[NFTA_OBJ_TYPE
]));
6380 static int nf_tables_dump_obj_done(struct netlink_callback
*cb
)
6382 struct nft_obj_filter
*filter
= cb
->data
;
6385 kfree(filter
->table
);
6392 /* called with rcu_read_lock held */
6393 static int nf_tables_getobj(struct net
*net
, struct sock
*nlsk
,
6394 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
6395 const struct nlattr
* const nla
[],
6396 struct netlink_ext_ack
*extack
)
6398 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
6399 u8 genmask
= nft_genmask_cur(net
);
6400 int family
= nfmsg
->nfgen_family
;
6401 const struct nft_table
*table
;
6402 struct nft_object
*obj
;
6403 struct sk_buff
*skb2
;
6408 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
6409 struct netlink_dump_control c
= {
6410 .start
= nf_tables_dump_obj_start
,
6411 .dump
= nf_tables_dump_obj
,
6412 .done
= nf_tables_dump_obj_done
,
6413 .module
= THIS_MODULE
,
6414 .data
= (void *)nla
,
6417 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
6420 if (!nla
[NFTA_OBJ_NAME
] ||
6421 !nla
[NFTA_OBJ_TYPE
])
6424 table
= nft_table_lookup(net
, nla
[NFTA_OBJ_TABLE
], family
, genmask
, 0);
6425 if (IS_ERR(table
)) {
6426 NL_SET_BAD_ATTR(extack
, nla
[NFTA_OBJ_TABLE
]);
6427 return PTR_ERR(table
);
6430 objtype
= ntohl(nla_get_be32(nla
[NFTA_OBJ_TYPE
]));
6431 obj
= nft_obj_lookup(net
, table
, nla
[NFTA_OBJ_NAME
], objtype
, genmask
);
6433 NL_SET_BAD_ATTR(extack
, nla
[NFTA_OBJ_NAME
]);
6434 return PTR_ERR(obj
);
6437 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
6441 if (NFNL_MSG_TYPE(nlh
->nlmsg_type
) == NFT_MSG_GETOBJ_RESET
)
6445 char *buf
= kasprintf(GFP_ATOMIC
, "%s:%llu;?:0",
6446 table
->name
, table
->handle
);
6448 audit_log_nfcfg(buf
,
6451 AUDIT_NFT_OP_OBJ_RESET
,
6456 err
= nf_tables_fill_obj_info(skb2
, net
, NETLINK_CB(skb
).portid
,
6457 nlh
->nlmsg_seq
, NFT_MSG_NEWOBJ
, 0,
6458 family
, table
, obj
, reset
);
6460 goto err_fill_obj_info
;
6462 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
6469 static void nft_obj_destroy(const struct nft_ctx
*ctx
, struct nft_object
*obj
)
6471 if (obj
->ops
->destroy
)
6472 obj
->ops
->destroy(ctx
, obj
);
6474 module_put(obj
->ops
->type
->owner
);
6475 kfree(obj
->key
.name
);
6480 static int nf_tables_delobj(struct net
*net
, struct sock
*nlsk
,
6481 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
6482 const struct nlattr
* const nla
[],
6483 struct netlink_ext_ack
*extack
)
6485 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
6486 u8 genmask
= nft_genmask_next(net
);
6487 int family
= nfmsg
->nfgen_family
;
6488 const struct nlattr
*attr
;
6489 struct nft_table
*table
;
6490 struct nft_object
*obj
;
6494 if (!nla
[NFTA_OBJ_TYPE
] ||
6495 (!nla
[NFTA_OBJ_NAME
] && !nla
[NFTA_OBJ_HANDLE
]))
6498 table
= nft_table_lookup(net
, nla
[NFTA_OBJ_TABLE
], family
, genmask
,
6499 NETLINK_CB(skb
).portid
);
6500 if (IS_ERR(table
)) {
6501 NL_SET_BAD_ATTR(extack
, nla
[NFTA_OBJ_TABLE
]);
6502 return PTR_ERR(table
);
6505 objtype
= ntohl(nla_get_be32(nla
[NFTA_OBJ_TYPE
]));
6506 if (nla
[NFTA_OBJ_HANDLE
]) {
6507 attr
= nla
[NFTA_OBJ_HANDLE
];
6508 obj
= nft_obj_lookup_byhandle(table
, attr
, objtype
, genmask
);
6510 attr
= nla
[NFTA_OBJ_NAME
];
6511 obj
= nft_obj_lookup(net
, table
, attr
, objtype
, genmask
);
6515 NL_SET_BAD_ATTR(extack
, attr
);
6516 return PTR_ERR(obj
);
6519 NL_SET_BAD_ATTR(extack
, attr
);
6523 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
6525 return nft_delobj(&ctx
, obj
);
6528 void nft_obj_notify(struct net
*net
, const struct nft_table
*table
,
6529 struct nft_object
*obj
, u32 portid
, u32 seq
, int event
,
6530 int family
, int report
, gfp_t gfp
)
6532 struct sk_buff
*skb
;
6534 char *buf
= kasprintf(gfp
, "%s:%llu;?:0",
6535 table
->name
, table
->handle
);
6537 audit_log_nfcfg(buf
,
6540 event
== NFT_MSG_NEWOBJ
?
6541 AUDIT_NFT_OP_OBJ_REGISTER
:
6542 AUDIT_NFT_OP_OBJ_UNREGISTER
,
6547 !nfnetlink_has_listeners(net
, NFNLGRP_NFTABLES
))
6550 skb
= nlmsg_new(NLMSG_GOODSIZE
, gfp
);
6554 err
= nf_tables_fill_obj_info(skb
, net
, portid
, seq
, event
, 0, family
,
6561 nft_notify_enqueue(skb
, report
, &net
->nft
.notify_list
);
6564 nfnetlink_set_err(net
, portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
6566 EXPORT_SYMBOL_GPL(nft_obj_notify
);
6568 static void nf_tables_obj_notify(const struct nft_ctx
*ctx
,
6569 struct nft_object
*obj
, int event
)
6571 nft_obj_notify(ctx
->net
, ctx
->table
, obj
, ctx
->portid
, ctx
->seq
, event
,
6572 ctx
->family
, ctx
->report
, GFP_KERNEL
);
6578 void nft_register_flowtable_type(struct nf_flowtable_type
*type
)
6580 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
6581 list_add_tail_rcu(&type
->list
, &nf_tables_flowtables
);
6582 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
6584 EXPORT_SYMBOL_GPL(nft_register_flowtable_type
);
6586 void nft_unregister_flowtable_type(struct nf_flowtable_type
*type
)
6588 nfnl_lock(NFNL_SUBSYS_NFTABLES
);
6589 list_del_rcu(&type
->list
);
6590 nfnl_unlock(NFNL_SUBSYS_NFTABLES
);
6592 EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type
);
6594 static const struct nla_policy nft_flowtable_policy
[NFTA_FLOWTABLE_MAX
+ 1] = {
6595 [NFTA_FLOWTABLE_TABLE
] = { .type
= NLA_STRING
,
6596 .len
= NFT_NAME_MAXLEN
- 1 },
6597 [NFTA_FLOWTABLE_NAME
] = { .type
= NLA_STRING
,
6598 .len
= NFT_NAME_MAXLEN
- 1 },
6599 [NFTA_FLOWTABLE_HOOK
] = { .type
= NLA_NESTED
},
6600 [NFTA_FLOWTABLE_HANDLE
] = { .type
= NLA_U64
},
6601 [NFTA_FLOWTABLE_FLAGS
] = { .type
= NLA_U32
},
6604 struct nft_flowtable
*nft_flowtable_lookup(const struct nft_table
*table
,
6605 const struct nlattr
*nla
, u8 genmask
)
6607 struct nft_flowtable
*flowtable
;
6609 list_for_each_entry_rcu(flowtable
, &table
->flowtables
, list
) {
6610 if (!nla_strcmp(nla
, flowtable
->name
) &&
6611 nft_active_genmask(flowtable
, genmask
))
6614 return ERR_PTR(-ENOENT
);
6616 EXPORT_SYMBOL_GPL(nft_flowtable_lookup
);
6618 void nf_tables_deactivate_flowtable(const struct nft_ctx
*ctx
,
6619 struct nft_flowtable
*flowtable
,
6620 enum nft_trans_phase phase
)
6623 case NFT_TRANS_PREPARE
:
6624 case NFT_TRANS_ABORT
:
6625 case NFT_TRANS_RELEASE
:
6632 EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable
);
6634 static struct nft_flowtable
*
6635 nft_flowtable_lookup_byhandle(const struct nft_table
*table
,
6636 const struct nlattr
*nla
, u8 genmask
)
6638 struct nft_flowtable
*flowtable
;
6640 list_for_each_entry(flowtable
, &table
->flowtables
, list
) {
6641 if (be64_to_cpu(nla_get_be64(nla
)) == flowtable
->handle
&&
6642 nft_active_genmask(flowtable
, genmask
))
6645 return ERR_PTR(-ENOENT
);
6648 struct nft_flowtable_hook
{
6651 struct list_head list
;
6654 static const struct nla_policy nft_flowtable_hook_policy
[NFTA_FLOWTABLE_HOOK_MAX
+ 1] = {
6655 [NFTA_FLOWTABLE_HOOK_NUM
] = { .type
= NLA_U32
},
6656 [NFTA_FLOWTABLE_HOOK_PRIORITY
] = { .type
= NLA_U32
},
6657 [NFTA_FLOWTABLE_HOOK_DEVS
] = { .type
= NLA_NESTED
},
6660 static int nft_flowtable_parse_hook(const struct nft_ctx
*ctx
,
6661 const struct nlattr
*attr
,
6662 struct nft_flowtable_hook
*flowtable_hook
,
6663 struct nft_flowtable
*flowtable
, bool add
)
6665 struct nlattr
*tb
[NFTA_FLOWTABLE_HOOK_MAX
+ 1];
6666 struct nft_hook
*hook
;
6667 int hooknum
, priority
;
6670 INIT_LIST_HEAD(&flowtable_hook
->list
);
6672 err
= nla_parse_nested_deprecated(tb
, NFTA_FLOWTABLE_HOOK_MAX
, attr
,
6673 nft_flowtable_hook_policy
, NULL
);
6678 if (!tb
[NFTA_FLOWTABLE_HOOK_NUM
] ||
6679 !tb
[NFTA_FLOWTABLE_HOOK_PRIORITY
])
6682 hooknum
= ntohl(nla_get_be32(tb
[NFTA_FLOWTABLE_HOOK_NUM
]));
6683 if (hooknum
!= NF_NETDEV_INGRESS
)
6686 priority
= ntohl(nla_get_be32(tb
[NFTA_FLOWTABLE_HOOK_PRIORITY
]));
6688 flowtable_hook
->priority
= priority
;
6689 flowtable_hook
->num
= hooknum
;
6691 if (tb
[NFTA_FLOWTABLE_HOOK_NUM
]) {
6692 hooknum
= ntohl(nla_get_be32(tb
[NFTA_FLOWTABLE_HOOK_NUM
]));
6693 if (hooknum
!= flowtable
->hooknum
)
6697 if (tb
[NFTA_FLOWTABLE_HOOK_PRIORITY
]) {
6698 priority
= ntohl(nla_get_be32(tb
[NFTA_FLOWTABLE_HOOK_PRIORITY
]));
6699 if (priority
!= flowtable
->data
.priority
)
6703 flowtable_hook
->priority
= flowtable
->data
.priority
;
6704 flowtable_hook
->num
= flowtable
->hooknum
;
6707 if (tb
[NFTA_FLOWTABLE_HOOK_DEVS
]) {
6708 err
= nf_tables_parse_netdev_hooks(ctx
->net
,
6709 tb
[NFTA_FLOWTABLE_HOOK_DEVS
],
6710 &flowtable_hook
->list
);
6715 list_for_each_entry(hook
, &flowtable_hook
->list
, list
) {
6716 hook
->ops
.pf
= NFPROTO_NETDEV
;
6717 hook
->ops
.hooknum
= flowtable_hook
->num
;
6718 hook
->ops
.priority
= flowtable_hook
->priority
;
6719 hook
->ops
.priv
= &flowtable
->data
;
6720 hook
->ops
.hook
= flowtable
->data
.type
->hook
;
6726 static const struct nf_flowtable_type
*__nft_flowtable_type_get(u8 family
)
6728 const struct nf_flowtable_type
*type
;
6730 list_for_each_entry(type
, &nf_tables_flowtables
, list
) {
6731 if (family
== type
->family
)
6737 static const struct nf_flowtable_type
*
6738 nft_flowtable_type_get(struct net
*net
, u8 family
)
6740 const struct nf_flowtable_type
*type
;
6742 type
= __nft_flowtable_type_get(family
);
6743 if (type
!= NULL
&& try_module_get(type
->owner
))
6746 lockdep_nfnl_nft_mutex_not_held();
6747 #ifdef CONFIG_MODULES
6749 if (nft_request_module(net
, "nf-flowtable-%u", family
) == -EAGAIN
)
6750 return ERR_PTR(-EAGAIN
);
6753 return ERR_PTR(-ENOENT
);
6756 /* Only called from error and netdev event paths. */
6757 static void nft_unregister_flowtable_hook(struct net
*net
,
6758 struct nft_flowtable
*flowtable
,
6759 struct nft_hook
*hook
)
6761 nf_unregister_net_hook(net
, &hook
->ops
);
6762 flowtable
->data
.type
->setup(&flowtable
->data
, hook
->ops
.dev
,
6766 static void nft_unregister_flowtable_net_hooks(struct net
*net
,
6767 struct list_head
*hook_list
)
6769 struct nft_hook
*hook
;
6771 list_for_each_entry(hook
, hook_list
, list
)
6772 nf_unregister_net_hook(net
, &hook
->ops
);
6775 static int nft_register_flowtable_net_hooks(struct net
*net
,
6776 struct nft_table
*table
,
6777 struct list_head
*hook_list
,
6778 struct nft_flowtable
*flowtable
)
6780 struct nft_hook
*hook
, *hook2
, *next
;
6781 struct nft_flowtable
*ft
;
6784 list_for_each_entry(hook
, hook_list
, list
) {
6785 list_for_each_entry(ft
, &table
->flowtables
, list
) {
6786 list_for_each_entry(hook2
, &ft
->hook_list
, list
) {
6787 if (hook
->ops
.dev
== hook2
->ops
.dev
&&
6788 hook
->ops
.pf
== hook2
->ops
.pf
) {
6790 goto err_unregister_net_hooks
;
6795 err
= flowtable
->data
.type
->setup(&flowtable
->data
,
6799 goto err_unregister_net_hooks
;
6801 err
= nf_register_net_hook(net
, &hook
->ops
);
6803 flowtable
->data
.type
->setup(&flowtable
->data
,
6806 goto err_unregister_net_hooks
;
6814 err_unregister_net_hooks
:
6815 list_for_each_entry_safe(hook
, next
, hook_list
, list
) {
6819 nft_unregister_flowtable_hook(net
, flowtable
, hook
);
6820 list_del_rcu(&hook
->list
);
6821 kfree_rcu(hook
, rcu
);
6827 static void nft_flowtable_hooks_destroy(struct list_head
*hook_list
)
6829 struct nft_hook
*hook
, *next
;
6831 list_for_each_entry_safe(hook
, next
, hook_list
, list
) {
6832 list_del_rcu(&hook
->list
);
6833 kfree_rcu(hook
, rcu
);
6837 static int nft_flowtable_update(struct nft_ctx
*ctx
, const struct nlmsghdr
*nlh
,
6838 struct nft_flowtable
*flowtable
)
6840 const struct nlattr
* const *nla
= ctx
->nla
;
6841 struct nft_flowtable_hook flowtable_hook
;
6842 struct nft_hook
*hook
, *next
;
6843 struct nft_trans
*trans
;
6844 bool unregister
= false;
6847 err
= nft_flowtable_parse_hook(ctx
, nla
[NFTA_FLOWTABLE_HOOK
],
6848 &flowtable_hook
, flowtable
, false);
6852 list_for_each_entry_safe(hook
, next
, &flowtable_hook
.list
, list
) {
6853 if (nft_hook_list_find(&flowtable
->hook_list
, hook
)) {
6854 list_del(&hook
->list
);
6859 err
= nft_register_flowtable_net_hooks(ctx
->net
, ctx
->table
,
6860 &flowtable_hook
.list
, flowtable
);
6862 goto err_flowtable_update_hook
;
6864 trans
= nft_trans_alloc(ctx
, NFT_MSG_NEWFLOWTABLE
,
6865 sizeof(struct nft_trans_flowtable
));
6869 goto err_flowtable_update_hook
;
6872 nft_trans_flowtable(trans
) = flowtable
;
6873 nft_trans_flowtable_update(trans
) = true;
6874 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans
));
6875 list_splice(&flowtable_hook
.list
, &nft_trans_flowtable_hooks(trans
));
6877 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
6881 err_flowtable_update_hook
:
6882 list_for_each_entry_safe(hook
, next
, &flowtable_hook
.list
, list
) {
6884 nft_unregister_flowtable_hook(ctx
->net
, flowtable
, hook
);
6885 list_del_rcu(&hook
->list
);
6886 kfree_rcu(hook
, rcu
);
6893 static int nf_tables_newflowtable(struct net
*net
, struct sock
*nlsk
,
6894 struct sk_buff
*skb
,
6895 const struct nlmsghdr
*nlh
,
6896 const struct nlattr
* const nla
[],
6897 struct netlink_ext_ack
*extack
)
6899 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
6900 struct nft_flowtable_hook flowtable_hook
;
6901 const struct nf_flowtable_type
*type
;
6902 u8 genmask
= nft_genmask_next(net
);
6903 int family
= nfmsg
->nfgen_family
;
6904 struct nft_flowtable
*flowtable
;
6905 struct nft_hook
*hook
, *next
;
6906 struct nft_table
*table
;
6910 if (!nla
[NFTA_FLOWTABLE_TABLE
] ||
6911 !nla
[NFTA_FLOWTABLE_NAME
] ||
6912 !nla
[NFTA_FLOWTABLE_HOOK
])
6915 table
= nft_table_lookup(net
, nla
[NFTA_FLOWTABLE_TABLE
], family
,
6916 genmask
, NETLINK_CB(skb
).portid
);
6917 if (IS_ERR(table
)) {
6918 NL_SET_BAD_ATTR(extack
, nla
[NFTA_FLOWTABLE_TABLE
]);
6919 return PTR_ERR(table
);
6922 flowtable
= nft_flowtable_lookup(table
, nla
[NFTA_FLOWTABLE_NAME
],
6924 if (IS_ERR(flowtable
)) {
6925 err
= PTR_ERR(flowtable
);
6926 if (err
!= -ENOENT
) {
6927 NL_SET_BAD_ATTR(extack
, nla
[NFTA_FLOWTABLE_NAME
]);
6931 if (nlh
->nlmsg_flags
& NLM_F_EXCL
) {
6932 NL_SET_BAD_ATTR(extack
, nla
[NFTA_FLOWTABLE_NAME
]);
6936 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
6938 return nft_flowtable_update(&ctx
, nlh
, flowtable
);
6941 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
6943 flowtable
= kzalloc(sizeof(*flowtable
), GFP_KERNEL
);
6947 flowtable
->table
= table
;
6948 flowtable
->handle
= nf_tables_alloc_handle(table
);
6949 INIT_LIST_HEAD(&flowtable
->hook_list
);
6951 flowtable
->name
= nla_strdup(nla
[NFTA_FLOWTABLE_NAME
], GFP_KERNEL
);
6952 if (!flowtable
->name
) {
6957 type
= nft_flowtable_type_get(net
, family
);
6959 err
= PTR_ERR(type
);
6963 if (nla
[NFTA_FLOWTABLE_FLAGS
]) {
6964 flowtable
->data
.flags
=
6965 ntohl(nla_get_be32(nla
[NFTA_FLOWTABLE_FLAGS
]));
6966 if (flowtable
->data
.flags
& ~NFT_FLOWTABLE_MASK
)
6970 write_pnet(&flowtable
->data
.net
, net
);
6971 flowtable
->data
.type
= type
;
6972 err
= type
->init(&flowtable
->data
);
6976 err
= nft_flowtable_parse_hook(&ctx
, nla
[NFTA_FLOWTABLE_HOOK
],
6977 &flowtable_hook
, flowtable
, true);
6981 list_splice(&flowtable_hook
.list
, &flowtable
->hook_list
);
6982 flowtable
->data
.priority
= flowtable_hook
.priority
;
6983 flowtable
->hooknum
= flowtable_hook
.num
;
6985 err
= nft_register_flowtable_net_hooks(ctx
.net
, table
,
6986 &flowtable
->hook_list
,
6989 nft_flowtable_hooks_destroy(&flowtable
->hook_list
);
6993 err
= nft_trans_flowtable_add(&ctx
, NFT_MSG_NEWFLOWTABLE
, flowtable
);
6997 list_add_tail_rcu(&flowtable
->list
, &table
->flowtables
);
7002 list_for_each_entry_safe(hook
, next
, &flowtable
->hook_list
, list
) {
7003 nft_unregister_flowtable_hook(net
, flowtable
, hook
);
7004 list_del_rcu(&hook
->list
);
7005 kfree_rcu(hook
, rcu
);
7008 flowtable
->data
.type
->free(&flowtable
->data
);
7010 module_put(type
->owner
);
7012 kfree(flowtable
->name
);
7018 static void nft_flowtable_hook_release(struct nft_flowtable_hook
*flowtable_hook
)
7020 struct nft_hook
*this, *next
;
7022 list_for_each_entry_safe(this, next
, &flowtable_hook
->list
, list
) {
7023 list_del(&this->list
);
7028 static int nft_delflowtable_hook(struct nft_ctx
*ctx
,
7029 struct nft_flowtable
*flowtable
)
7031 const struct nlattr
* const *nla
= ctx
->nla
;
7032 struct nft_flowtable_hook flowtable_hook
;
7033 struct nft_hook
*this, *hook
;
7034 struct nft_trans
*trans
;
7037 err
= nft_flowtable_parse_hook(ctx
, nla
[NFTA_FLOWTABLE_HOOK
],
7038 &flowtable_hook
, flowtable
, false);
7042 list_for_each_entry(this, &flowtable_hook
.list
, list
) {
7043 hook
= nft_hook_list_find(&flowtable
->hook_list
, this);
7046 goto err_flowtable_del_hook
;
7048 hook
->inactive
= true;
7051 trans
= nft_trans_alloc(ctx
, NFT_MSG_DELFLOWTABLE
,
7052 sizeof(struct nft_trans_flowtable
));
7055 goto err_flowtable_del_hook
;
7058 nft_trans_flowtable(trans
) = flowtable
;
7059 nft_trans_flowtable_update(trans
) = true;
7060 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans
));
7061 nft_flowtable_hook_release(&flowtable_hook
);
7063 list_add_tail(&trans
->list
, &ctx
->net
->nft
.commit_list
);
7067 err_flowtable_del_hook
:
7068 list_for_each_entry(this, &flowtable_hook
.list
, list
) {
7069 hook
= nft_hook_list_find(&flowtable
->hook_list
, this);
7073 hook
->inactive
= false;
7075 nft_flowtable_hook_release(&flowtable_hook
);
7080 static int nf_tables_delflowtable(struct net
*net
, struct sock
*nlsk
,
7081 struct sk_buff
*skb
,
7082 const struct nlmsghdr
*nlh
,
7083 const struct nlattr
* const nla
[],
7084 struct netlink_ext_ack
*extack
)
7086 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
7087 u8 genmask
= nft_genmask_next(net
);
7088 int family
= nfmsg
->nfgen_family
;
7089 struct nft_flowtable
*flowtable
;
7090 const struct nlattr
*attr
;
7091 struct nft_table
*table
;
7094 if (!nla
[NFTA_FLOWTABLE_TABLE
] ||
7095 (!nla
[NFTA_FLOWTABLE_NAME
] &&
7096 !nla
[NFTA_FLOWTABLE_HANDLE
]))
7099 table
= nft_table_lookup(net
, nla
[NFTA_FLOWTABLE_TABLE
], family
,
7100 genmask
, NETLINK_CB(skb
).portid
);
7101 if (IS_ERR(table
)) {
7102 NL_SET_BAD_ATTR(extack
, nla
[NFTA_FLOWTABLE_TABLE
]);
7103 return PTR_ERR(table
);
7106 if (nla
[NFTA_FLOWTABLE_HANDLE
]) {
7107 attr
= nla
[NFTA_FLOWTABLE_HANDLE
];
7108 flowtable
= nft_flowtable_lookup_byhandle(table
, attr
, genmask
);
7110 attr
= nla
[NFTA_FLOWTABLE_NAME
];
7111 flowtable
= nft_flowtable_lookup(table
, attr
, genmask
);
7114 if (IS_ERR(flowtable
)) {
7115 NL_SET_BAD_ATTR(extack
, attr
);
7116 return PTR_ERR(flowtable
);
7119 nft_ctx_init(&ctx
, net
, skb
, nlh
, family
, table
, NULL
, nla
);
7121 if (nla
[NFTA_FLOWTABLE_HOOK
])
7122 return nft_delflowtable_hook(&ctx
, flowtable
);
7124 if (flowtable
->use
> 0) {
7125 NL_SET_BAD_ATTR(extack
, attr
);
7129 return nft_delflowtable(&ctx
, flowtable
);
7132 static int nf_tables_fill_flowtable_info(struct sk_buff
*skb
, struct net
*net
,
7133 u32 portid
, u32 seq
, int event
,
7134 u32 flags
, int family
,
7135 struct nft_flowtable
*flowtable
,
7136 struct list_head
*hook_list
)
7138 struct nlattr
*nest
, *nest_devs
;
7139 struct nfgenmsg
*nfmsg
;
7140 struct nft_hook
*hook
;
7141 struct nlmsghdr
*nlh
;
7143 event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, event
);
7144 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
), flags
);
7146 goto nla_put_failure
;
7148 nfmsg
= nlmsg_data(nlh
);
7149 nfmsg
->nfgen_family
= family
;
7150 nfmsg
->version
= NFNETLINK_V0
;
7151 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
7153 if (nla_put_string(skb
, NFTA_FLOWTABLE_TABLE
, flowtable
->table
->name
) ||
7154 nla_put_string(skb
, NFTA_FLOWTABLE_NAME
, flowtable
->name
) ||
7155 nla_put_be32(skb
, NFTA_FLOWTABLE_USE
, htonl(flowtable
->use
)) ||
7156 nla_put_be64(skb
, NFTA_FLOWTABLE_HANDLE
, cpu_to_be64(flowtable
->handle
),
7157 NFTA_FLOWTABLE_PAD
) ||
7158 nla_put_be32(skb
, NFTA_FLOWTABLE_FLAGS
, htonl(flowtable
->data
.flags
)))
7159 goto nla_put_failure
;
7161 nest
= nla_nest_start_noflag(skb
, NFTA_FLOWTABLE_HOOK
);
7163 goto nla_put_failure
;
7164 if (nla_put_be32(skb
, NFTA_FLOWTABLE_HOOK_NUM
, htonl(flowtable
->hooknum
)) ||
7165 nla_put_be32(skb
, NFTA_FLOWTABLE_HOOK_PRIORITY
, htonl(flowtable
->data
.priority
)))
7166 goto nla_put_failure
;
7168 nest_devs
= nla_nest_start_noflag(skb
, NFTA_FLOWTABLE_HOOK_DEVS
);
7170 goto nla_put_failure
;
7172 list_for_each_entry_rcu(hook
, hook_list
, list
) {
7173 if (nla_put_string(skb
, NFTA_DEVICE_NAME
, hook
->ops
.dev
->name
))
7174 goto nla_put_failure
;
7176 nla_nest_end(skb
, nest_devs
);
7177 nla_nest_end(skb
, nest
);
7179 nlmsg_end(skb
, nlh
);
7183 nlmsg_trim(skb
, nlh
);
7187 struct nft_flowtable_filter
{
7191 static int nf_tables_dump_flowtable(struct sk_buff
*skb
,
7192 struct netlink_callback
*cb
)
7194 const struct nfgenmsg
*nfmsg
= nlmsg_data(cb
->nlh
);
7195 struct nft_flowtable_filter
*filter
= cb
->data
;
7196 unsigned int idx
= 0, s_idx
= cb
->args
[0];
7197 struct net
*net
= sock_net(skb
->sk
);
7198 int family
= nfmsg
->nfgen_family
;
7199 struct nft_flowtable
*flowtable
;
7200 const struct nft_table
*table
;
7203 cb
->seq
= net
->nft
.base_seq
;
7205 list_for_each_entry_rcu(table
, &net
->nft
.tables
, list
) {
7206 if (family
!= NFPROTO_UNSPEC
&& family
!= table
->family
)
7209 list_for_each_entry_rcu(flowtable
, &table
->flowtables
, list
) {
7210 if (!nft_is_active(net
, flowtable
))
7215 memset(&cb
->args
[1], 0,
7216 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
7217 if (filter
&& filter
->table
&&
7218 strcmp(filter
->table
, table
->name
))
7221 if (nf_tables_fill_flowtable_info(skb
, net
, NETLINK_CB(cb
->skb
).portid
,
7223 NFT_MSG_NEWFLOWTABLE
,
7224 NLM_F_MULTI
| NLM_F_APPEND
,
7227 &flowtable
->hook_list
) < 0)
7230 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
7242 static int nf_tables_dump_flowtable_start(struct netlink_callback
*cb
)
7244 const struct nlattr
* const *nla
= cb
->data
;
7245 struct nft_flowtable_filter
*filter
= NULL
;
7247 if (nla
[NFTA_FLOWTABLE_TABLE
]) {
7248 filter
= kzalloc(sizeof(*filter
), GFP_ATOMIC
);
7252 filter
->table
= nla_strdup(nla
[NFTA_FLOWTABLE_TABLE
],
7254 if (!filter
->table
) {
7264 static int nf_tables_dump_flowtable_done(struct netlink_callback
*cb
)
7266 struct nft_flowtable_filter
*filter
= cb
->data
;
7271 kfree(filter
->table
);
7277 /* called with rcu_read_lock held */
7278 static int nf_tables_getflowtable(struct net
*net
, struct sock
*nlsk
,
7279 struct sk_buff
*skb
,
7280 const struct nlmsghdr
*nlh
,
7281 const struct nlattr
* const nla
[],
7282 struct netlink_ext_ack
*extack
)
7284 const struct nfgenmsg
*nfmsg
= nlmsg_data(nlh
);
7285 u8 genmask
= nft_genmask_cur(net
);
7286 int family
= nfmsg
->nfgen_family
;
7287 struct nft_flowtable
*flowtable
;
7288 const struct nft_table
*table
;
7289 struct sk_buff
*skb2
;
7292 if (nlh
->nlmsg_flags
& NLM_F_DUMP
) {
7293 struct netlink_dump_control c
= {
7294 .start
= nf_tables_dump_flowtable_start
,
7295 .dump
= nf_tables_dump_flowtable
,
7296 .done
= nf_tables_dump_flowtable_done
,
7297 .module
= THIS_MODULE
,
7298 .data
= (void *)nla
,
7301 return nft_netlink_dump_start_rcu(nlsk
, skb
, nlh
, &c
);
7304 if (!nla
[NFTA_FLOWTABLE_NAME
])
7307 table
= nft_table_lookup(net
, nla
[NFTA_FLOWTABLE_TABLE
], family
,
7310 return PTR_ERR(table
);
7312 flowtable
= nft_flowtable_lookup(table
, nla
[NFTA_FLOWTABLE_NAME
],
7314 if (IS_ERR(flowtable
))
7315 return PTR_ERR(flowtable
);
7317 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
7321 err
= nf_tables_fill_flowtable_info(skb2
, net
, NETLINK_CB(skb
).portid
,
7323 NFT_MSG_NEWFLOWTABLE
, 0, family
,
7324 flowtable
, &flowtable
->hook_list
);
7326 goto err_fill_flowtable_info
;
7328 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
7330 err_fill_flowtable_info
:
7335 static void nf_tables_flowtable_notify(struct nft_ctx
*ctx
,
7336 struct nft_flowtable
*flowtable
,
7337 struct list_head
*hook_list
,
7340 struct sk_buff
*skb
;
7342 char *buf
= kasprintf(GFP_KERNEL
, "%s:%llu;%s:%llu",
7343 flowtable
->table
->name
, flowtable
->table
->handle
,
7344 flowtable
->name
, flowtable
->handle
);
7346 audit_log_nfcfg(buf
,
7349 event
== NFT_MSG_NEWFLOWTABLE
?
7350 AUDIT_NFT_OP_FLOWTABLE_REGISTER
:
7351 AUDIT_NFT_OP_FLOWTABLE_UNREGISTER
,
7356 !nfnetlink_has_listeners(ctx
->net
, NFNLGRP_NFTABLES
))
7359 skb
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
7363 err
= nf_tables_fill_flowtable_info(skb
, ctx
->net
, ctx
->portid
,
7365 ctx
->family
, flowtable
, hook_list
);
7371 nft_notify_enqueue(skb
, ctx
->report
, &ctx
->net
->nft
.notify_list
);
7374 nfnetlink_set_err(ctx
->net
, ctx
->portid
, NFNLGRP_NFTABLES
, -ENOBUFS
);
7377 static void nf_tables_flowtable_destroy(struct nft_flowtable
*flowtable
)
7379 struct nft_hook
*hook
, *next
;
7381 flowtable
->data
.type
->free(&flowtable
->data
);
7382 list_for_each_entry_safe(hook
, next
, &flowtable
->hook_list
, list
) {
7383 flowtable
->data
.type
->setup(&flowtable
->data
, hook
->ops
.dev
,
7385 list_del_rcu(&hook
->list
);
7388 kfree(flowtable
->name
);
7389 module_put(flowtable
->data
.type
->owner
);
7393 static int nf_tables_fill_gen_info(struct sk_buff
*skb
, struct net
*net
,
7394 u32 portid
, u32 seq
)
7396 struct nlmsghdr
*nlh
;
7397 struct nfgenmsg
*nfmsg
;
7398 char buf
[TASK_COMM_LEN
];
7399 int event
= nfnl_msg_type(NFNL_SUBSYS_NFTABLES
, NFT_MSG_NEWGEN
);
7401 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct nfgenmsg
), 0);
7403 goto nla_put_failure
;
7405 nfmsg
= nlmsg_data(nlh
);
7406 nfmsg
->nfgen_family
= AF_UNSPEC
;
7407 nfmsg
->version
= NFNETLINK_V0
;
7408 nfmsg
->res_id
= htons(net
->nft
.base_seq
& 0xffff);
7410 if (nla_put_be32(skb
, NFTA_GEN_ID
, htonl(net
->nft
.base_seq
)) ||
7411 nla_put_be32(skb
, NFTA_GEN_PROC_PID
, htonl(task_pid_nr(current
))) ||
7412 nla_put_string(skb
, NFTA_GEN_PROC_NAME
, get_task_comm(buf
, current
)))
7413 goto nla_put_failure
;
7415 nlmsg_end(skb
, nlh
);
7419 nlmsg_trim(skb
, nlh
);
7423 static void nft_flowtable_event(unsigned long event
, struct net_device
*dev
,
7424 struct nft_flowtable
*flowtable
)
7426 struct nft_hook
*hook
;
7428 list_for_each_entry(hook
, &flowtable
->hook_list
, list
) {
7429 if (hook
->ops
.dev
!= dev
)
7432 /* flow_offload_netdev_event() cleans up entries for us. */
7433 nft_unregister_flowtable_hook(dev_net(dev
), flowtable
, hook
);
7434 list_del_rcu(&hook
->list
);
7435 kfree_rcu(hook
, rcu
);
7440 static int nf_tables_flowtable_event(struct notifier_block
*this,
7441 unsigned long event
, void *ptr
)
7443 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
7444 struct nft_flowtable
*flowtable
;
7445 struct nft_table
*table
;
7448 if (event
!= NETDEV_UNREGISTER
)
7452 mutex_lock(&net
->nft
.commit_mutex
);
7453 list_for_each_entry(table
, &net
->nft
.tables
, list
) {
7454 list_for_each_entry(flowtable
, &table
->flowtables
, list
) {
7455 nft_flowtable_event(event
, dev
, flowtable
);
7458 mutex_unlock(&net
->nft
.commit_mutex
);
7463 static struct notifier_block nf_tables_flowtable_notifier
= {
7464 .notifier_call
= nf_tables_flowtable_event
,
7467 static void nf_tables_gen_notify(struct net
*net
, struct sk_buff
*skb
,
7470 struct nlmsghdr
*nlh
= nlmsg_hdr(skb
);
7471 struct sk_buff
*skb2
;
7474 audit_log_nfcfg("?:0;?:0", 0, net
->nft
.base_seq
,
7475 AUDIT_NFT_OP_GEN_REGISTER
, GFP_KERNEL
);
7477 if (!nlmsg_report(nlh
) &&
7478 !nfnetlink_has_listeners(net
, NFNLGRP_NFTABLES
))
7481 skb2
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
7485 err
= nf_tables_fill_gen_info(skb2
, net
, NETLINK_CB(skb
).portid
,
7492 nfnetlink_send(skb2
, net
, NETLINK_CB(skb
).portid
, NFNLGRP_NFTABLES
,
7493 nlmsg_report(nlh
), GFP_KERNEL
);
7496 nfnetlink_set_err(net
, NETLINK_CB(skb
).portid
, NFNLGRP_NFTABLES
,
7500 static int nf_tables_getgen(struct net
*net
, struct sock
*nlsk
,
7501 struct sk_buff
*skb
, const struct nlmsghdr
*nlh
,
7502 const struct nlattr
* const nla
[],
7503 struct netlink_ext_ack
*extack
)
7505 struct sk_buff
*skb2
;
7508 skb2
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
7512 err
= nf_tables_fill_gen_info(skb2
, net
, NETLINK_CB(skb
).portid
,
7515 goto err_fill_gen_info
;
7517 return nfnetlink_unicast(skb2
, net
, NETLINK_CB(skb
).portid
);
7524 static const struct nfnl_callback nf_tables_cb
[NFT_MSG_MAX
] = {
7525 [NFT_MSG_NEWTABLE
] = {
7526 .call_batch
= nf_tables_newtable
,
7527 .attr_count
= NFTA_TABLE_MAX
,
7528 .policy
= nft_table_policy
,
7530 [NFT_MSG_GETTABLE
] = {
7531 .call_rcu
= nf_tables_gettable
,
7532 .attr_count
= NFTA_TABLE_MAX
,
7533 .policy
= nft_table_policy
,
7535 [NFT_MSG_DELTABLE
] = {
7536 .call_batch
= nf_tables_deltable
,
7537 .attr_count
= NFTA_TABLE_MAX
,
7538 .policy
= nft_table_policy
,
7540 [NFT_MSG_NEWCHAIN
] = {
7541 .call_batch
= nf_tables_newchain
,
7542 .attr_count
= NFTA_CHAIN_MAX
,
7543 .policy
= nft_chain_policy
,
7545 [NFT_MSG_GETCHAIN
] = {
7546 .call_rcu
= nf_tables_getchain
,
7547 .attr_count
= NFTA_CHAIN_MAX
,
7548 .policy
= nft_chain_policy
,
7550 [NFT_MSG_DELCHAIN
] = {
7551 .call_batch
= nf_tables_delchain
,
7552 .attr_count
= NFTA_CHAIN_MAX
,
7553 .policy
= nft_chain_policy
,
7555 [NFT_MSG_NEWRULE
] = {
7556 .call_batch
= nf_tables_newrule
,
7557 .attr_count
= NFTA_RULE_MAX
,
7558 .policy
= nft_rule_policy
,
7560 [NFT_MSG_GETRULE
] = {
7561 .call_rcu
= nf_tables_getrule
,
7562 .attr_count
= NFTA_RULE_MAX
,
7563 .policy
= nft_rule_policy
,
7565 [NFT_MSG_DELRULE
] = {
7566 .call_batch
= nf_tables_delrule
,
7567 .attr_count
= NFTA_RULE_MAX
,
7568 .policy
= nft_rule_policy
,
7570 [NFT_MSG_NEWSET
] = {
7571 .call_batch
= nf_tables_newset
,
7572 .attr_count
= NFTA_SET_MAX
,
7573 .policy
= nft_set_policy
,
7575 [NFT_MSG_GETSET
] = {
7576 .call_rcu
= nf_tables_getset
,
7577 .attr_count
= NFTA_SET_MAX
,
7578 .policy
= nft_set_policy
,
7580 [NFT_MSG_DELSET
] = {
7581 .call_batch
= nf_tables_delset
,
7582 .attr_count
= NFTA_SET_MAX
,
7583 .policy
= nft_set_policy
,
7585 [NFT_MSG_NEWSETELEM
] = {
7586 .call_batch
= nf_tables_newsetelem
,
7587 .attr_count
= NFTA_SET_ELEM_LIST_MAX
,
7588 .policy
= nft_set_elem_list_policy
,
7590 [NFT_MSG_GETSETELEM
] = {
7591 .call_rcu
= nf_tables_getsetelem
,
7592 .attr_count
= NFTA_SET_ELEM_LIST_MAX
,
7593 .policy
= nft_set_elem_list_policy
,
7595 [NFT_MSG_DELSETELEM
] = {
7596 .call_batch
= nf_tables_delsetelem
,
7597 .attr_count
= NFTA_SET_ELEM_LIST_MAX
,
7598 .policy
= nft_set_elem_list_policy
,
7600 [NFT_MSG_GETGEN
] = {
7601 .call_rcu
= nf_tables_getgen
,
7603 [NFT_MSG_NEWOBJ
] = {
7604 .call_batch
= nf_tables_newobj
,
7605 .attr_count
= NFTA_OBJ_MAX
,
7606 .policy
= nft_obj_policy
,
7608 [NFT_MSG_GETOBJ
] = {
7609 .call_rcu
= nf_tables_getobj
,
7610 .attr_count
= NFTA_OBJ_MAX
,
7611 .policy
= nft_obj_policy
,
7613 [NFT_MSG_DELOBJ
] = {
7614 .call_batch
= nf_tables_delobj
,
7615 .attr_count
= NFTA_OBJ_MAX
,
7616 .policy
= nft_obj_policy
,
7618 [NFT_MSG_GETOBJ_RESET
] = {
7619 .call_rcu
= nf_tables_getobj
,
7620 .attr_count
= NFTA_OBJ_MAX
,
7621 .policy
= nft_obj_policy
,
7623 [NFT_MSG_NEWFLOWTABLE
] = {
7624 .call_batch
= nf_tables_newflowtable
,
7625 .attr_count
= NFTA_FLOWTABLE_MAX
,
7626 .policy
= nft_flowtable_policy
,
7628 [NFT_MSG_GETFLOWTABLE
] = {
7629 .call_rcu
= nf_tables_getflowtable
,
7630 .attr_count
= NFTA_FLOWTABLE_MAX
,
7631 .policy
= nft_flowtable_policy
,
7633 [NFT_MSG_DELFLOWTABLE
] = {
7634 .call_batch
= nf_tables_delflowtable
,
7635 .attr_count
= NFTA_FLOWTABLE_MAX
,
7636 .policy
= nft_flowtable_policy
,
7640 static int nf_tables_validate(struct net
*net
)
7642 struct nft_table
*table
;
7644 switch (net
->nft
.validate_state
) {
7645 case NFT_VALIDATE_SKIP
:
7647 case NFT_VALIDATE_NEED
:
7648 nft_validate_state_update(net
, NFT_VALIDATE_DO
);
7650 case NFT_VALIDATE_DO
:
7651 list_for_each_entry(table
, &net
->nft
.tables
, list
) {
7652 if (nft_table_validate(net
, table
) < 0)
7661 /* a drop policy has to be deferred until all rules have been activated,
7662 * otherwise a large ruleset that contains a drop-policy base chain will
7663 * cause all packets to get dropped until the full transaction has been
7666 * We defer the drop policy until the transaction has been finalized.
7668 static void nft_chain_commit_drop_policy(struct nft_trans
*trans
)
7670 struct nft_base_chain
*basechain
;
7672 if (nft_trans_chain_policy(trans
) != NF_DROP
)
7675 if (!nft_is_base_chain(trans
->ctx
.chain
))
7678 basechain
= nft_base_chain(trans
->ctx
.chain
);
7679 basechain
->policy
= NF_DROP
;
7682 static void nft_chain_commit_update(struct nft_trans
*trans
)
7684 struct nft_base_chain
*basechain
;
7686 if (nft_trans_chain_name(trans
)) {
7687 rhltable_remove(&trans
->ctx
.table
->chains_ht
,
7688 &trans
->ctx
.chain
->rhlhead
,
7689 nft_chain_ht_params
);
7690 swap(trans
->ctx
.chain
->name
, nft_trans_chain_name(trans
));
7691 rhltable_insert_key(&trans
->ctx
.table
->chains_ht
,
7692 trans
->ctx
.chain
->name
,
7693 &trans
->ctx
.chain
->rhlhead
,
7694 nft_chain_ht_params
);
7697 if (!nft_is_base_chain(trans
->ctx
.chain
))
7700 nft_chain_stats_replace(trans
);
7702 basechain
= nft_base_chain(trans
->ctx
.chain
);
7704 switch (nft_trans_chain_policy(trans
)) {
7707 basechain
->policy
= nft_trans_chain_policy(trans
);
7712 static void nft_obj_commit_update(struct nft_trans
*trans
)
7714 struct nft_object
*newobj
;
7715 struct nft_object
*obj
;
7717 obj
= nft_trans_obj(trans
);
7718 newobj
= nft_trans_obj_newobj(trans
);
7720 if (obj
->ops
->update
)
7721 obj
->ops
->update(obj
, newobj
);
7726 static void nft_commit_release(struct nft_trans
*trans
)
7728 switch (trans
->msg_type
) {
7729 case NFT_MSG_DELTABLE
:
7730 nf_tables_table_destroy(&trans
->ctx
);
7732 case NFT_MSG_NEWCHAIN
:
7733 free_percpu(nft_trans_chain_stats(trans
));
7734 kfree(nft_trans_chain_name(trans
));
7736 case NFT_MSG_DELCHAIN
:
7737 nf_tables_chain_destroy(&trans
->ctx
);
7739 case NFT_MSG_DELRULE
:
7740 nf_tables_rule_destroy(&trans
->ctx
, nft_trans_rule(trans
));
7742 case NFT_MSG_DELSET
:
7743 nft_set_destroy(&trans
->ctx
, nft_trans_set(trans
));
7745 case NFT_MSG_DELSETELEM
:
7746 nf_tables_set_elem_destroy(&trans
->ctx
,
7747 nft_trans_elem_set(trans
),
7748 nft_trans_elem(trans
).priv
);
7750 case NFT_MSG_DELOBJ
:
7751 nft_obj_destroy(&trans
->ctx
, nft_trans_obj(trans
));
7753 case NFT_MSG_DELFLOWTABLE
:
7754 if (nft_trans_flowtable_update(trans
))
7755 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans
));
7757 nf_tables_flowtable_destroy(nft_trans_flowtable(trans
));
7762 put_net(trans
->ctx
.net
);
7767 static void nf_tables_trans_destroy_work(struct work_struct
*w
)
7769 struct nft_trans
*trans
, *next
;
7772 spin_lock(&nf_tables_destroy_list_lock
);
7773 list_splice_init(&nf_tables_destroy_list
, &head
);
7774 spin_unlock(&nf_tables_destroy_list_lock
);
7776 if (list_empty(&head
))
7781 list_for_each_entry_safe(trans
, next
, &head
, list
) {
7782 list_del(&trans
->list
);
7783 nft_commit_release(trans
);
7787 void nf_tables_trans_destroy_flush_work(void)
7789 flush_work(&trans_destroy_work
);
7791 EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work
);
7793 static int nf_tables_commit_chain_prepare(struct net
*net
, struct nft_chain
*chain
)
7795 struct nft_rule
*rule
;
7796 unsigned int alloc
= 0;
7799 /* already handled or inactive chain? */
7800 if (chain
->rules_next
|| !nft_is_active_next(net
, chain
))
7803 rule
= list_entry(&chain
->rules
, struct nft_rule
, list
);
7806 list_for_each_entry_continue(rule
, &chain
->rules
, list
) {
7807 if (nft_is_active_next(net
, rule
))
7811 chain
->rules_next
= nf_tables_chain_alloc_rules(chain
, alloc
);
7812 if (!chain
->rules_next
)
7815 list_for_each_entry_continue(rule
, &chain
->rules
, list
) {
7816 if (nft_is_active_next(net
, rule
))
7817 chain
->rules_next
[i
++] = rule
;
7820 chain
->rules_next
[i
] = NULL
;
7824 static void nf_tables_commit_chain_prepare_cancel(struct net
*net
)
7826 struct nft_trans
*trans
, *next
;
7828 list_for_each_entry_safe(trans
, next
, &net
->nft
.commit_list
, list
) {
7829 struct nft_chain
*chain
= trans
->ctx
.chain
;
7831 if (trans
->msg_type
== NFT_MSG_NEWRULE
||
7832 trans
->msg_type
== NFT_MSG_DELRULE
) {
7833 kvfree(chain
->rules_next
);
7834 chain
->rules_next
= NULL
;
7839 static void __nf_tables_commit_chain_free_rules_old(struct rcu_head
*h
)
7841 struct nft_rules_old
*o
= container_of(h
, struct nft_rules_old
, h
);
7846 static void nf_tables_commit_chain_free_rules_old(struct nft_rule
**rules
)
7848 struct nft_rule
**r
= rules
;
7849 struct nft_rules_old
*old
;
7854 r
++; /* rcu_head is after end marker */
7858 call_rcu(&old
->h
, __nf_tables_commit_chain_free_rules_old
);
7861 static void nf_tables_commit_chain(struct net
*net
, struct nft_chain
*chain
)
7863 struct nft_rule
**g0
, **g1
;
7866 next_genbit
= nft_gencursor_next(net
);
7868 g0
= rcu_dereference_protected(chain
->rules_gen_0
,
7869 lockdep_commit_lock_is_held(net
));
7870 g1
= rcu_dereference_protected(chain
->rules_gen_1
,
7871 lockdep_commit_lock_is_held(net
));
7873 /* No changes to this chain? */
7874 if (chain
->rules_next
== NULL
) {
7875 /* chain had no change in last or next generation */
7879 * chain had no change in this generation; make sure next
7880 * one uses same rules as current generation.
7883 rcu_assign_pointer(chain
->rules_gen_1
, g0
);
7884 nf_tables_commit_chain_free_rules_old(g1
);
7886 rcu_assign_pointer(chain
->rules_gen_0
, g1
);
7887 nf_tables_commit_chain_free_rules_old(g0
);
7894 rcu_assign_pointer(chain
->rules_gen_1
, chain
->rules_next
);
7896 rcu_assign_pointer(chain
->rules_gen_0
, chain
->rules_next
);
7898 chain
->rules_next
= NULL
;
7904 nf_tables_commit_chain_free_rules_old(g1
);
7906 nf_tables_commit_chain_free_rules_old(g0
);
7909 static void nft_obj_del(struct nft_object
*obj
)
7911 rhltable_remove(&nft_objname_ht
, &obj
->rhlhead
, nft_objname_ht_params
);
7912 list_del_rcu(&obj
->list
);
7915 void nft_chain_del(struct nft_chain
*chain
)
7917 struct nft_table
*table
= chain
->table
;
7919 WARN_ON_ONCE(rhltable_remove(&table
->chains_ht
, &chain
->rhlhead
,
7920 nft_chain_ht_params
));
7921 list_del_rcu(&chain
->list
);
7924 static void nft_flowtable_hooks_del(struct nft_flowtable
*flowtable
,
7925 struct list_head
*hook_list
)
7927 struct nft_hook
*hook
, *next
;
7929 list_for_each_entry_safe(hook
, next
, &flowtable
->hook_list
, list
) {
7931 list_move(&hook
->list
, hook_list
);
7935 static void nf_tables_module_autoload_cleanup(struct net
*net
)
7937 struct nft_module_request
*req
, *next
;
7939 WARN_ON_ONCE(!list_empty(&net
->nft
.commit_list
));
7940 list_for_each_entry_safe(req
, next
, &net
->nft
.module_list
, list
) {
7941 WARN_ON_ONCE(!req
->done
);
7942 list_del(&req
->list
);
7947 static void nf_tables_commit_release(struct net
*net
)
7949 struct nft_trans
*trans
;
7951 /* all side effects have to be made visible.
7952 * For example, if a chain named 'foo' has been deleted, a
7953 * new transaction must not find it anymore.
7955 * Memory reclaim happens asynchronously from work queue
7956 * to prevent expensive synchronize_rcu() in commit phase.
7958 if (list_empty(&net
->nft
.commit_list
)) {
7959 nf_tables_module_autoload_cleanup(net
);
7960 mutex_unlock(&net
->nft
.commit_mutex
);
7964 trans
= list_last_entry(&net
->nft
.commit_list
,
7965 struct nft_trans
, list
);
7966 get_net(trans
->ctx
.net
);
7967 WARN_ON_ONCE(trans
->put_net
);
7969 trans
->put_net
= true;
7970 spin_lock(&nf_tables_destroy_list_lock
);
7971 list_splice_tail_init(&net
->nft
.commit_list
, &nf_tables_destroy_list
);
7972 spin_unlock(&nf_tables_destroy_list_lock
);
7974 nf_tables_module_autoload_cleanup(net
);
7975 schedule_work(&trans_destroy_work
);
7977 mutex_unlock(&net
->nft
.commit_mutex
);
7980 static void nft_commit_notify(struct net
*net
, u32 portid
)
7982 struct sk_buff
*batch_skb
= NULL
, *nskb
, *skb
;
7983 unsigned char *data
;
7986 list_for_each_entry_safe(skb
, nskb
, &net
->nft
.notify_list
, list
) {
7990 len
= NLMSG_GOODSIZE
- skb
->len
;
7991 list_del(&skb
->list
);
7995 if (len
> 0 && NFT_CB(skb
).report
== NFT_CB(batch_skb
).report
) {
7996 data
= skb_put(batch_skb
, skb
->len
);
7997 memcpy(data
, skb
->data
, skb
->len
);
7998 list_del(&skb
->list
);
8002 nfnetlink_send(batch_skb
, net
, portid
, NFNLGRP_NFTABLES
,
8003 NFT_CB(batch_skb
).report
, GFP_KERNEL
);
8008 nfnetlink_send(batch_skb
, net
, portid
, NFNLGRP_NFTABLES
,
8009 NFT_CB(batch_skb
).report
, GFP_KERNEL
);
8012 WARN_ON_ONCE(!list_empty(&net
->nft
.notify_list
));
8015 static int nf_tables_commit(struct net
*net
, struct sk_buff
*skb
)
8017 struct nft_trans
*trans
, *next
;
8018 struct nft_trans_elem
*te
;
8019 struct nft_chain
*chain
;
8020 struct nft_table
*table
;
8023 if (list_empty(&net
->nft
.commit_list
)) {
8024 mutex_unlock(&net
->nft
.commit_mutex
);
8028 /* 0. Validate ruleset, otherwise roll back for error reporting. */
8029 if (nf_tables_validate(net
) < 0)
8032 err
= nft_flow_rule_offload_commit(net
);
8036 /* 1. Allocate space for next generation rules_gen_X[] */
8037 list_for_each_entry_safe(trans
, next
, &net
->nft
.commit_list
, list
) {
8040 if (trans
->msg_type
== NFT_MSG_NEWRULE
||
8041 trans
->msg_type
== NFT_MSG_DELRULE
) {
8042 chain
= trans
->ctx
.chain
;
8044 ret
= nf_tables_commit_chain_prepare(net
, chain
);
8046 nf_tables_commit_chain_prepare_cancel(net
);
8052 /* step 2. Make rules_gen_X visible to packet path */
8053 list_for_each_entry(table
, &net
->nft
.tables
, list
) {
8054 list_for_each_entry(chain
, &table
->chains
, list
)
8055 nf_tables_commit_chain(net
, chain
);
8059 * Bump generation counter, invalidate any dump in progress.
8060 * Cannot fail after this point.
8062 while (++net
->nft
.base_seq
== 0);
8064 /* step 3. Start new generation, rules_gen_X now in use. */
8065 net
->nft
.gencursor
= nft_gencursor_next(net
);
8067 list_for_each_entry_safe(trans
, next
, &net
->nft
.commit_list
, list
) {
8068 switch (trans
->msg_type
) {
8069 case NFT_MSG_NEWTABLE
:
8070 if (nft_trans_table_update(trans
)) {
8071 if (!nft_trans_table_enable(trans
)) {
8072 nf_tables_table_disable(net
,
8074 trans
->ctx
.table
->flags
|= NFT_TABLE_F_DORMANT
;
8077 nft_clear(net
, trans
->ctx
.table
);
8079 nf_tables_table_notify(&trans
->ctx
, NFT_MSG_NEWTABLE
);
8080 nft_trans_destroy(trans
);
8082 case NFT_MSG_DELTABLE
:
8083 list_del_rcu(&trans
->ctx
.table
->list
);
8084 nf_tables_table_notify(&trans
->ctx
, NFT_MSG_DELTABLE
);
8086 case NFT_MSG_NEWCHAIN
:
8087 if (nft_trans_chain_update(trans
)) {
8088 nft_chain_commit_update(trans
);
8089 nf_tables_chain_notify(&trans
->ctx
, NFT_MSG_NEWCHAIN
);
8090 /* trans destroyed after rcu grace period */
8092 nft_chain_commit_drop_policy(trans
);
8093 nft_clear(net
, trans
->ctx
.chain
);
8094 nf_tables_chain_notify(&trans
->ctx
, NFT_MSG_NEWCHAIN
);
8095 nft_trans_destroy(trans
);
8098 case NFT_MSG_DELCHAIN
:
8099 nft_chain_del(trans
->ctx
.chain
);
8100 nf_tables_chain_notify(&trans
->ctx
, NFT_MSG_DELCHAIN
);
8101 nf_tables_unregister_hook(trans
->ctx
.net
,
8105 case NFT_MSG_NEWRULE
:
8106 nft_clear(trans
->ctx
.net
, nft_trans_rule(trans
));
8107 nf_tables_rule_notify(&trans
->ctx
,
8108 nft_trans_rule(trans
),
8110 nft_trans_destroy(trans
);
8112 case NFT_MSG_DELRULE
:
8113 list_del_rcu(&nft_trans_rule(trans
)->list
);
8114 nf_tables_rule_notify(&trans
->ctx
,
8115 nft_trans_rule(trans
),
8117 nft_rule_expr_deactivate(&trans
->ctx
,
8118 nft_trans_rule(trans
),
8121 case NFT_MSG_NEWSET
:
8122 nft_clear(net
, nft_trans_set(trans
));
8123 /* This avoids hitting -EBUSY when deleting the table
8124 * from the transaction.
8126 if (nft_set_is_anonymous(nft_trans_set(trans
)) &&
8127 !list_empty(&nft_trans_set(trans
)->bindings
))
8128 trans
->ctx
.table
->use
--;
8130 nf_tables_set_notify(&trans
->ctx
, nft_trans_set(trans
),
8131 NFT_MSG_NEWSET
, GFP_KERNEL
);
8132 nft_trans_destroy(trans
);
8134 case NFT_MSG_DELSET
:
8135 list_del_rcu(&nft_trans_set(trans
)->list
);
8136 nf_tables_set_notify(&trans
->ctx
, nft_trans_set(trans
),
8137 NFT_MSG_DELSET
, GFP_KERNEL
);
8139 case NFT_MSG_NEWSETELEM
:
8140 te
= (struct nft_trans_elem
*)trans
->data
;
8142 te
->set
->ops
->activate(net
, te
->set
, &te
->elem
);
8143 nf_tables_setelem_notify(&trans
->ctx
, te
->set
,
8145 NFT_MSG_NEWSETELEM
, 0);
8146 nft_trans_destroy(trans
);
8148 case NFT_MSG_DELSETELEM
:
8149 te
= (struct nft_trans_elem
*)trans
->data
;
8151 nf_tables_setelem_notify(&trans
->ctx
, te
->set
,
8153 NFT_MSG_DELSETELEM
, 0);
8154 te
->set
->ops
->remove(net
, te
->set
, &te
->elem
);
8155 atomic_dec(&te
->set
->nelems
);
8158 case NFT_MSG_NEWOBJ
:
8159 if (nft_trans_obj_update(trans
)) {
8160 nft_obj_commit_update(trans
);
8161 nf_tables_obj_notify(&trans
->ctx
,
8162 nft_trans_obj(trans
),
8165 nft_clear(net
, nft_trans_obj(trans
));
8166 nf_tables_obj_notify(&trans
->ctx
,
8167 nft_trans_obj(trans
),
8169 nft_trans_destroy(trans
);
8172 case NFT_MSG_DELOBJ
:
8173 nft_obj_del(nft_trans_obj(trans
));
8174 nf_tables_obj_notify(&trans
->ctx
, nft_trans_obj(trans
),
8177 case NFT_MSG_NEWFLOWTABLE
:
8178 if (nft_trans_flowtable_update(trans
)) {
8179 nf_tables_flowtable_notify(&trans
->ctx
,
8180 nft_trans_flowtable(trans
),
8181 &nft_trans_flowtable_hooks(trans
),
8182 NFT_MSG_NEWFLOWTABLE
);
8183 list_splice(&nft_trans_flowtable_hooks(trans
),
8184 &nft_trans_flowtable(trans
)->hook_list
);
8186 nft_clear(net
, nft_trans_flowtable(trans
));
8187 nf_tables_flowtable_notify(&trans
->ctx
,
8188 nft_trans_flowtable(trans
),
8189 &nft_trans_flowtable(trans
)->hook_list
,
8190 NFT_MSG_NEWFLOWTABLE
);
8192 nft_trans_destroy(trans
);
8194 case NFT_MSG_DELFLOWTABLE
:
8195 if (nft_trans_flowtable_update(trans
)) {
8196 nft_flowtable_hooks_del(nft_trans_flowtable(trans
),
8197 &nft_trans_flowtable_hooks(trans
));
8198 nf_tables_flowtable_notify(&trans
->ctx
,
8199 nft_trans_flowtable(trans
),
8200 &nft_trans_flowtable_hooks(trans
),
8201 NFT_MSG_DELFLOWTABLE
);
8202 nft_unregister_flowtable_net_hooks(net
,
8203 &nft_trans_flowtable_hooks(trans
));
8205 list_del_rcu(&nft_trans_flowtable(trans
)->list
);
8206 nf_tables_flowtable_notify(&trans
->ctx
,
8207 nft_trans_flowtable(trans
),
8208 &nft_trans_flowtable(trans
)->hook_list
,
8209 NFT_MSG_DELFLOWTABLE
);
8210 nft_unregister_flowtable_net_hooks(net
,
8211 &nft_trans_flowtable(trans
)->hook_list
);
8217 nft_commit_notify(net
, NETLINK_CB(skb
).portid
);
8218 nf_tables_gen_notify(net
, skb
, NFT_MSG_NEWGEN
);
8219 nf_tables_commit_release(net
);
8224 static void nf_tables_module_autoload(struct net
*net
)
8226 struct nft_module_request
*req
, *next
;
8227 LIST_HEAD(module_list
);
8229 list_splice_init(&net
->nft
.module_list
, &module_list
);
8230 mutex_unlock(&net
->nft
.commit_mutex
);
8231 list_for_each_entry_safe(req
, next
, &module_list
, list
) {
8232 request_module("%s", req
->module
);
8235 mutex_lock(&net
->nft
.commit_mutex
);
8236 list_splice(&module_list
, &net
->nft
.module_list
);
8239 static void nf_tables_abort_release(struct nft_trans
*trans
)
8241 switch (trans
->msg_type
) {
8242 case NFT_MSG_NEWTABLE
:
8243 nf_tables_table_destroy(&trans
->ctx
);
8245 case NFT_MSG_NEWCHAIN
:
8246 nf_tables_chain_destroy(&trans
->ctx
);
8248 case NFT_MSG_NEWRULE
:
8249 nf_tables_rule_destroy(&trans
->ctx
, nft_trans_rule(trans
));
8251 case NFT_MSG_NEWSET
:
8252 nft_set_destroy(&trans
->ctx
, nft_trans_set(trans
));
8254 case NFT_MSG_NEWSETELEM
:
8255 nft_set_elem_destroy(nft_trans_elem_set(trans
),
8256 nft_trans_elem(trans
).priv
, true);
8258 case NFT_MSG_NEWOBJ
:
8259 nft_obj_destroy(&trans
->ctx
, nft_trans_obj(trans
));
8261 case NFT_MSG_NEWFLOWTABLE
:
8262 if (nft_trans_flowtable_update(trans
))
8263 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans
));
8265 nf_tables_flowtable_destroy(nft_trans_flowtable(trans
));
8271 static int __nf_tables_abort(struct net
*net
, enum nfnl_abort_action action
)
8273 struct nft_trans
*trans
, *next
;
8274 struct nft_trans_elem
*te
;
8275 struct nft_hook
*hook
;
8277 if (action
== NFNL_ABORT_VALIDATE
&&
8278 nf_tables_validate(net
) < 0)
8281 list_for_each_entry_safe_reverse(trans
, next
, &net
->nft
.commit_list
,
8283 switch (trans
->msg_type
) {
8284 case NFT_MSG_NEWTABLE
:
8285 if (nft_trans_table_update(trans
)) {
8286 if (nft_trans_table_enable(trans
)) {
8287 nf_tables_table_disable(net
,
8289 trans
->ctx
.table
->flags
|= NFT_TABLE_F_DORMANT
;
8291 nft_trans_destroy(trans
);
8293 list_del_rcu(&trans
->ctx
.table
->list
);
8296 case NFT_MSG_DELTABLE
:
8297 nft_clear(trans
->ctx
.net
, trans
->ctx
.table
);
8298 nft_trans_destroy(trans
);
8300 case NFT_MSG_NEWCHAIN
:
8301 if (nft_trans_chain_update(trans
)) {
8302 free_percpu(nft_trans_chain_stats(trans
));
8303 kfree(nft_trans_chain_name(trans
));
8304 nft_trans_destroy(trans
);
8306 if (nft_chain_is_bound(trans
->ctx
.chain
)) {
8307 nft_trans_destroy(trans
);
8310 trans
->ctx
.table
->use
--;
8311 nft_chain_del(trans
->ctx
.chain
);
8312 nf_tables_unregister_hook(trans
->ctx
.net
,
8317 case NFT_MSG_DELCHAIN
:
8318 trans
->ctx
.table
->use
++;
8319 nft_clear(trans
->ctx
.net
, trans
->ctx
.chain
);
8320 nft_trans_destroy(trans
);
8322 case NFT_MSG_NEWRULE
:
8323 trans
->ctx
.chain
->use
--;
8324 list_del_rcu(&nft_trans_rule(trans
)->list
);
8325 nft_rule_expr_deactivate(&trans
->ctx
,
8326 nft_trans_rule(trans
),
8329 case NFT_MSG_DELRULE
:
8330 trans
->ctx
.chain
->use
++;
8331 nft_clear(trans
->ctx
.net
, nft_trans_rule(trans
));
8332 nft_rule_expr_activate(&trans
->ctx
, nft_trans_rule(trans
));
8333 nft_trans_destroy(trans
);
8335 case NFT_MSG_NEWSET
:
8336 trans
->ctx
.table
->use
--;
8337 if (nft_trans_set_bound(trans
)) {
8338 nft_trans_destroy(trans
);
8341 list_del_rcu(&nft_trans_set(trans
)->list
);
8343 case NFT_MSG_DELSET
:
8344 trans
->ctx
.table
->use
++;
8345 nft_clear(trans
->ctx
.net
, nft_trans_set(trans
));
8346 nft_trans_destroy(trans
);
8348 case NFT_MSG_NEWSETELEM
:
8349 if (nft_trans_elem_set_bound(trans
)) {
8350 nft_trans_destroy(trans
);
8353 te
= (struct nft_trans_elem
*)trans
->data
;
8354 te
->set
->ops
->remove(net
, te
->set
, &te
->elem
);
8355 atomic_dec(&te
->set
->nelems
);
8357 case NFT_MSG_DELSETELEM
:
8358 te
= (struct nft_trans_elem
*)trans
->data
;
8360 nft_set_elem_activate(net
, te
->set
, &te
->elem
);
8361 te
->set
->ops
->activate(net
, te
->set
, &te
->elem
);
8364 nft_trans_destroy(trans
);
8366 case NFT_MSG_NEWOBJ
:
8367 if (nft_trans_obj_update(trans
)) {
8368 kfree(nft_trans_obj_newobj(trans
));
8369 nft_trans_destroy(trans
);
8371 trans
->ctx
.table
->use
--;
8372 nft_obj_del(nft_trans_obj(trans
));
8375 case NFT_MSG_DELOBJ
:
8376 trans
->ctx
.table
->use
++;
8377 nft_clear(trans
->ctx
.net
, nft_trans_obj(trans
));
8378 nft_trans_destroy(trans
);
8380 case NFT_MSG_NEWFLOWTABLE
:
8381 if (nft_trans_flowtable_update(trans
)) {
8382 nft_unregister_flowtable_net_hooks(net
,
8383 &nft_trans_flowtable_hooks(trans
));
8385 trans
->ctx
.table
->use
--;
8386 list_del_rcu(&nft_trans_flowtable(trans
)->list
);
8387 nft_unregister_flowtable_net_hooks(net
,
8388 &nft_trans_flowtable(trans
)->hook_list
);
8391 case NFT_MSG_DELFLOWTABLE
:
8392 if (nft_trans_flowtable_update(trans
)) {
8393 list_for_each_entry(hook
, &nft_trans_flowtable(trans
)->hook_list
, list
)
8394 hook
->inactive
= false;
8396 trans
->ctx
.table
->use
++;
8397 nft_clear(trans
->ctx
.net
, nft_trans_flowtable(trans
));
8399 nft_trans_destroy(trans
);
8406 list_for_each_entry_safe_reverse(trans
, next
,
8407 &net
->nft
.commit_list
, list
) {
8408 list_del(&trans
->list
);
8409 nf_tables_abort_release(trans
);
8412 if (action
== NFNL_ABORT_AUTOLOAD
)
8413 nf_tables_module_autoload(net
);
8415 nf_tables_module_autoload_cleanup(net
);
8420 static void nf_tables_cleanup(struct net
*net
)
8422 nft_validate_state_update(net
, NFT_VALIDATE_SKIP
);
8425 static int nf_tables_abort(struct net
*net
, struct sk_buff
*skb
,
8426 enum nfnl_abort_action action
)
8428 int ret
= __nf_tables_abort(net
, action
);
8430 mutex_unlock(&net
->nft
.commit_mutex
);
8435 static bool nf_tables_valid_genid(struct net
*net
, u32 genid
)
8439 mutex_lock(&net
->nft
.commit_mutex
);
8441 genid_ok
= genid
== 0 || net
->nft
.base_seq
== genid
;
8443 mutex_unlock(&net
->nft
.commit_mutex
);
8445 /* else, commit mutex has to be released by commit or abort function */
8449 static const struct nfnetlink_subsystem nf_tables_subsys
= {
8450 .name
= "nf_tables",
8451 .subsys_id
= NFNL_SUBSYS_NFTABLES
,
8452 .cb_count
= NFT_MSG_MAX
,
8454 .commit
= nf_tables_commit
,
8455 .abort
= nf_tables_abort
,
8456 .cleanup
= nf_tables_cleanup
,
8457 .valid_genid
= nf_tables_valid_genid
,
8458 .owner
= THIS_MODULE
,
8461 int nft_chain_validate_dependency(const struct nft_chain
*chain
,
8462 enum nft_chain_types type
)
8464 const struct nft_base_chain
*basechain
;
8466 if (nft_is_base_chain(chain
)) {
8467 basechain
= nft_base_chain(chain
);
8468 if (basechain
->type
->type
!= type
)
8473 EXPORT_SYMBOL_GPL(nft_chain_validate_dependency
);
8475 int nft_chain_validate_hooks(const struct nft_chain
*chain
,
8476 unsigned int hook_flags
)
8478 struct nft_base_chain
*basechain
;
8480 if (nft_is_base_chain(chain
)) {
8481 basechain
= nft_base_chain(chain
);
8483 if ((1 << basechain
->ops
.hooknum
) & hook_flags
)
8491 EXPORT_SYMBOL_GPL(nft_chain_validate_hooks
);
8494 * Loop detection - walk through the ruleset beginning at the destination chain
8495 * of a new jump until either the source chain is reached (loop) or all
8496 * reachable chains have been traversed.
8498 * The loop check is performed whenever a new jump verdict is added to an
8499 * expression or verdict map or a verdict map is bound to a new chain.
8502 static int nf_tables_check_loops(const struct nft_ctx
*ctx
,
8503 const struct nft_chain
*chain
);
8505 static int nf_tables_loop_check_setelem(const struct nft_ctx
*ctx
,
8506 struct nft_set
*set
,
8507 const struct nft_set_iter
*iter
,
8508 struct nft_set_elem
*elem
)
8510 const struct nft_set_ext
*ext
= nft_set_elem_ext(set
, elem
->priv
);
8511 const struct nft_data
*data
;
8513 if (nft_set_ext_exists(ext
, NFT_SET_EXT_FLAGS
) &&
8514 *nft_set_ext_flags(ext
) & NFT_SET_ELEM_INTERVAL_END
)
8517 data
= nft_set_ext_data(ext
);
8518 switch (data
->verdict
.code
) {
8521 return nf_tables_check_loops(ctx
, data
->verdict
.chain
);
8527 static int nf_tables_check_loops(const struct nft_ctx
*ctx
,
8528 const struct nft_chain
*chain
)
8530 const struct nft_rule
*rule
;
8531 const struct nft_expr
*expr
, *last
;
8532 struct nft_set
*set
;
8533 struct nft_set_binding
*binding
;
8534 struct nft_set_iter iter
;
8536 if (ctx
->chain
== chain
)
8539 list_for_each_entry(rule
, &chain
->rules
, list
) {
8540 nft_rule_for_each_expr(expr
, last
, rule
) {
8541 struct nft_immediate_expr
*priv
;
8542 const struct nft_data
*data
;
8545 if (strcmp(expr
->ops
->type
->name
, "immediate"))
8548 priv
= nft_expr_priv(expr
);
8549 if (priv
->dreg
!= NFT_REG_VERDICT
)
8553 switch (data
->verdict
.code
) {
8556 err
= nf_tables_check_loops(ctx
,
8557 data
->verdict
.chain
);
8566 list_for_each_entry(set
, &ctx
->table
->sets
, list
) {
8567 if (!nft_is_active_next(ctx
->net
, set
))
8569 if (!(set
->flags
& NFT_SET_MAP
) ||
8570 set
->dtype
!= NFT_DATA_VERDICT
)
8573 list_for_each_entry(binding
, &set
->bindings
, list
) {
8574 if (!(binding
->flags
& NFT_SET_MAP
) ||
8575 binding
->chain
!= chain
)
8578 iter
.genmask
= nft_genmask_next(ctx
->net
);
8582 iter
.fn
= nf_tables_loop_check_setelem
;
8584 set
->ops
->walk(ctx
, set
, &iter
);
8594 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
8596 * @attr: netlink attribute to fetch value from
8597 * @max: maximum value to be stored in dest
8598 * @dest: pointer to the variable
8600 * Parse, check and store a given u32 netlink attribute into variable.
8601 * This function returns -ERANGE if the value goes over maximum value.
8602 * Otherwise a 0 is returned and the attribute value is stored in the
8603 * destination variable.
8605 int nft_parse_u32_check(const struct nlattr
*attr
, int max
, u32
*dest
)
8609 val
= ntohl(nla_get_be32(attr
));
8616 EXPORT_SYMBOL_GPL(nft_parse_u32_check
);
8619 * nft_parse_register - parse a register value from a netlink attribute
8621 * @attr: netlink attribute
8623 * Parse and translate a register value from a netlink attribute.
8624 * Registers used to be 128 bit wide, these register numbers will be
8625 * mapped to the corresponding 32 bit register numbers.
8627 static unsigned int nft_parse_register(const struct nlattr
*attr
)
8631 reg
= ntohl(nla_get_be32(attr
));
8633 case NFT_REG_VERDICT
...NFT_REG_4
:
8634 return reg
* NFT_REG_SIZE
/ NFT_REG32_SIZE
;
8636 return reg
+ NFT_REG_SIZE
/ NFT_REG32_SIZE
- NFT_REG32_00
;
8641 * nft_dump_register - dump a register value to a netlink attribute
8643 * @skb: socket buffer
8644 * @attr: attribute number
8645 * @reg: register number
8647 * Construct a netlink attribute containing the register number. For
8648 * compatibility reasons, register numbers being a multiple of 4 are
8649 * translated to the corresponding 128 bit register numbers.
8651 int nft_dump_register(struct sk_buff
*skb
, unsigned int attr
, unsigned int reg
)
8653 if (reg
% (NFT_REG_SIZE
/ NFT_REG32_SIZE
) == 0)
8654 reg
= reg
/ (NFT_REG_SIZE
/ NFT_REG32_SIZE
);
8656 reg
= reg
- NFT_REG_SIZE
/ NFT_REG32_SIZE
+ NFT_REG32_00
;
8658 return nla_put_be32(skb
, attr
, htonl(reg
));
8660 EXPORT_SYMBOL_GPL(nft_dump_register
);
8663 * nft_validate_register_load - validate a load from a register
8665 * @reg: the register number
8666 * @len: the length of the data
8668 * Validate that the input register is one of the general purpose
8669 * registers and that the length of the load is within the bounds.
8671 static int nft_validate_register_load(enum nft_registers reg
, unsigned int len
)
8673 if (reg
< NFT_REG_1
* NFT_REG_SIZE
/ NFT_REG32_SIZE
)
8677 if (reg
* NFT_REG32_SIZE
+ len
> sizeof_field(struct nft_regs
, data
))
8683 int nft_parse_register_load(const struct nlattr
*attr
, u8
*sreg
, u32 len
)
8688 reg
= nft_parse_register(attr
);
8689 err
= nft_validate_register_load(reg
, len
);
8696 EXPORT_SYMBOL_GPL(nft_parse_register_load
);
8699 * nft_validate_register_store - validate an expressions' register store
8701 * @ctx: context of the expression performing the load
8702 * @reg: the destination register number
8703 * @data: the data to load
8704 * @type: the data type
8705 * @len: the length of the data
8707 * Validate that a data load uses the appropriate data type for
8708 * the destination register and the length is within the bounds.
8709 * A value of NULL for the data means that its runtime gathered
8712 static int nft_validate_register_store(const struct nft_ctx
*ctx
,
8713 enum nft_registers reg
,
8714 const struct nft_data
*data
,
8715 enum nft_data_types type
,
8721 case NFT_REG_VERDICT
:
8722 if (type
!= NFT_DATA_VERDICT
)
8726 (data
->verdict
.code
== NFT_GOTO
||
8727 data
->verdict
.code
== NFT_JUMP
)) {
8728 err
= nf_tables_check_loops(ctx
, data
->verdict
.chain
);
8735 if (reg
< NFT_REG_1
* NFT_REG_SIZE
/ NFT_REG32_SIZE
)
8739 if (reg
* NFT_REG32_SIZE
+ len
>
8740 sizeof_field(struct nft_regs
, data
))
8743 if (data
!= NULL
&& type
!= NFT_DATA_VALUE
)
8749 int nft_parse_register_store(const struct nft_ctx
*ctx
,
8750 const struct nlattr
*attr
, u8
*dreg
,
8751 const struct nft_data
*data
,
8752 enum nft_data_types type
, unsigned int len
)
8757 reg
= nft_parse_register(attr
);
8758 err
= nft_validate_register_store(ctx
, reg
, data
, type
, len
);
8765 EXPORT_SYMBOL_GPL(nft_parse_register_store
);
8767 static const struct nla_policy nft_verdict_policy
[NFTA_VERDICT_MAX
+ 1] = {
8768 [NFTA_VERDICT_CODE
] = { .type
= NLA_U32
},
8769 [NFTA_VERDICT_CHAIN
] = { .type
= NLA_STRING
,
8770 .len
= NFT_CHAIN_MAXNAMELEN
- 1 },
8771 [NFTA_VERDICT_CHAIN_ID
] = { .type
= NLA_U32
},
8774 static int nft_verdict_init(const struct nft_ctx
*ctx
, struct nft_data
*data
,
8775 struct nft_data_desc
*desc
, const struct nlattr
*nla
)
8777 u8 genmask
= nft_genmask_next(ctx
->net
);
8778 struct nlattr
*tb
[NFTA_VERDICT_MAX
+ 1];
8779 struct nft_chain
*chain
;
8782 err
= nla_parse_nested_deprecated(tb
, NFTA_VERDICT_MAX
, nla
,
8783 nft_verdict_policy
, NULL
);
8787 if (!tb
[NFTA_VERDICT_CODE
])
8789 data
->verdict
.code
= ntohl(nla_get_be32(tb
[NFTA_VERDICT_CODE
]));
8791 switch (data
->verdict
.code
) {
8793 switch (data
->verdict
.code
& NF_VERDICT_MASK
) {
8808 if (tb
[NFTA_VERDICT_CHAIN
]) {
8809 chain
= nft_chain_lookup(ctx
->net
, ctx
->table
,
8810 tb
[NFTA_VERDICT_CHAIN
],
8812 } else if (tb
[NFTA_VERDICT_CHAIN_ID
]) {
8813 chain
= nft_chain_lookup_byid(ctx
->net
,
8814 tb
[NFTA_VERDICT_CHAIN_ID
]);
8816 return PTR_ERR(chain
);
8822 return PTR_ERR(chain
);
8823 if (nft_is_base_chain(chain
))
8827 data
->verdict
.chain
= chain
;
8831 desc
->len
= sizeof(data
->verdict
);
8832 desc
->type
= NFT_DATA_VERDICT
;
8836 static void nft_verdict_uninit(const struct nft_data
*data
)
8838 struct nft_chain
*chain
;
8839 struct nft_rule
*rule
;
8841 switch (data
->verdict
.code
) {
8844 chain
= data
->verdict
.chain
;
8847 if (!nft_chain_is_bound(chain
))
8850 chain
->table
->use
--;
8851 list_for_each_entry(rule
, &chain
->rules
, list
)
8854 nft_chain_del(chain
);
8859 int nft_verdict_dump(struct sk_buff
*skb
, int type
, const struct nft_verdict
*v
)
8861 struct nlattr
*nest
;
8863 nest
= nla_nest_start_noflag(skb
, type
);
8865 goto nla_put_failure
;
8867 if (nla_put_be32(skb
, NFTA_VERDICT_CODE
, htonl(v
->code
)))
8868 goto nla_put_failure
;
8873 if (nla_put_string(skb
, NFTA_VERDICT_CHAIN
,
8875 goto nla_put_failure
;
8877 nla_nest_end(skb
, nest
);
8884 static int nft_value_init(const struct nft_ctx
*ctx
,
8885 struct nft_data
*data
, unsigned int size
,
8886 struct nft_data_desc
*desc
, const struct nlattr
*nla
)
8896 nla_memcpy(data
->data
, nla
, len
);
8897 desc
->type
= NFT_DATA_VALUE
;
8902 static int nft_value_dump(struct sk_buff
*skb
, const struct nft_data
*data
,
8905 return nla_put(skb
, NFTA_DATA_VALUE
, len
, data
->data
);
8908 static const struct nla_policy nft_data_policy
[NFTA_DATA_MAX
+ 1] = {
8909 [NFTA_DATA_VALUE
] = { .type
= NLA_BINARY
},
8910 [NFTA_DATA_VERDICT
] = { .type
= NLA_NESTED
},
8914 * nft_data_init - parse nf_tables data netlink attributes
8916 * @ctx: context of the expression using the data
8917 * @data: destination struct nft_data
8918 * @size: maximum data length
8919 * @desc: data description
8920 * @nla: netlink attribute containing data
8922 * Parse the netlink data attributes and initialize a struct nft_data.
8923 * The type and length of data are returned in the data description.
8925 * The caller can indicate that it only wants to accept data of type
8926 * NFT_DATA_VALUE by passing NULL for the ctx argument.
8928 int nft_data_init(const struct nft_ctx
*ctx
,
8929 struct nft_data
*data
, unsigned int size
,
8930 struct nft_data_desc
*desc
, const struct nlattr
*nla
)
8932 struct nlattr
*tb
[NFTA_DATA_MAX
+ 1];
8935 err
= nla_parse_nested_deprecated(tb
, NFTA_DATA_MAX
, nla
,
8936 nft_data_policy
, NULL
);
8940 if (tb
[NFTA_DATA_VALUE
])
8941 return nft_value_init(ctx
, data
, size
, desc
,
8942 tb
[NFTA_DATA_VALUE
]);
8943 if (tb
[NFTA_DATA_VERDICT
] && ctx
!= NULL
)
8944 return nft_verdict_init(ctx
, data
, desc
, tb
[NFTA_DATA_VERDICT
]);
8947 EXPORT_SYMBOL_GPL(nft_data_init
);
8950 * nft_data_release - release a nft_data item
8952 * @data: struct nft_data to release
8953 * @type: type of data
8955 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
8956 * all others need to be released by calling this function.
8958 void nft_data_release(const struct nft_data
*data
, enum nft_data_types type
)
8960 if (type
< NFT_DATA_VERDICT
)
8963 case NFT_DATA_VERDICT
:
8964 return nft_verdict_uninit(data
);
8969 EXPORT_SYMBOL_GPL(nft_data_release
);
8971 int nft_data_dump(struct sk_buff
*skb
, int attr
, const struct nft_data
*data
,
8972 enum nft_data_types type
, unsigned int len
)
8974 struct nlattr
*nest
;
8977 nest
= nla_nest_start_noflag(skb
, attr
);
8982 case NFT_DATA_VALUE
:
8983 err
= nft_value_dump(skb
, data
, len
);
8985 case NFT_DATA_VERDICT
:
8986 err
= nft_verdict_dump(skb
, NFTA_DATA_VERDICT
, &data
->verdict
);
8993 nla_nest_end(skb
, nest
);
8996 EXPORT_SYMBOL_GPL(nft_data_dump
);
8998 int __nft_release_basechain(struct nft_ctx
*ctx
)
9000 struct nft_rule
*rule
, *nr
;
9002 if (WARN_ON(!nft_is_base_chain(ctx
->chain
)))
9005 nf_tables_unregister_hook(ctx
->net
, ctx
->chain
->table
, ctx
->chain
);
9006 list_for_each_entry_safe(rule
, nr
, &ctx
->chain
->rules
, list
) {
9007 list_del(&rule
->list
);
9009 nf_tables_rule_release(ctx
, rule
);
9011 nft_chain_del(ctx
->chain
);
9013 nf_tables_chain_destroy(ctx
);
9017 EXPORT_SYMBOL_GPL(__nft_release_basechain
);
9019 static void __nft_release_hook(struct net
*net
, struct nft_table
*table
)
9021 struct nft_chain
*chain
;
9023 list_for_each_entry(chain
, &table
->chains
, list
)
9024 nf_tables_unregister_hook(net
, table
, chain
);
9027 static void __nft_release_hooks(struct net
*net
)
9029 struct nft_table
*table
;
9031 list_for_each_entry(table
, &net
->nft
.tables
, list
) {
9032 if (nft_table_has_owner(table
))
9035 __nft_release_hook(net
, table
);
9039 static void __nft_release_table(struct net
*net
, struct nft_table
*table
)
9041 struct nft_flowtable
*flowtable
, *nf
;
9042 struct nft_chain
*chain
, *nc
;
9043 struct nft_object
*obj
, *ne
;
9044 struct nft_rule
*rule
, *nr
;
9045 struct nft_set
*set
, *ns
;
9046 struct nft_ctx ctx
= {
9048 .family
= NFPROTO_NETDEV
,
9051 ctx
.family
= table
->family
;
9053 list_for_each_entry(chain
, &table
->chains
, list
) {
9055 list_for_each_entry_safe(rule
, nr
, &chain
->rules
, list
) {
9056 list_del(&rule
->list
);
9058 nf_tables_rule_release(&ctx
, rule
);
9061 list_for_each_entry_safe(flowtable
, nf
, &table
->flowtables
, list
) {
9062 list_del(&flowtable
->list
);
9064 nf_tables_flowtable_destroy(flowtable
);
9066 list_for_each_entry_safe(set
, ns
, &table
->sets
, list
) {
9067 list_del(&set
->list
);
9069 nft_set_destroy(&ctx
, set
);
9071 list_for_each_entry_safe(obj
, ne
, &table
->objects
, list
) {
9074 nft_obj_destroy(&ctx
, obj
);
9076 list_for_each_entry_safe(chain
, nc
, &table
->chains
, list
) {
9078 nft_chain_del(chain
);
9080 nf_tables_chain_destroy(&ctx
);
9082 list_del(&table
->list
);
9083 nf_tables_table_destroy(&ctx
);
9086 static void __nft_release_tables(struct net
*net
)
9088 struct nft_table
*table
, *nt
;
9090 list_for_each_entry_safe(table
, nt
, &net
->nft
.tables
, list
) {
9091 if (nft_table_has_owner(table
))
9094 __nft_release_table(net
, table
);
9098 static int nft_rcv_nl_event(struct notifier_block
*this, unsigned long event
,
9101 struct netlink_notify
*n
= ptr
;
9102 struct nft_table
*table
, *nt
;
9103 struct net
*net
= n
->net
;
9104 bool release
= false;
9106 if (event
!= NETLINK_URELEASE
|| n
->protocol
!= NETLINK_NETFILTER
)
9109 mutex_lock(&net
->nft
.commit_mutex
);
9110 list_for_each_entry(table
, &net
->nft
.tables
, list
) {
9111 if (nft_table_has_owner(table
) &&
9112 n
->portid
== table
->nlpid
) {
9113 __nft_release_hook(net
, table
);
9119 list_for_each_entry_safe(table
, nt
, &net
->nft
.tables
, list
) {
9120 if (nft_table_has_owner(table
) &&
9121 n
->portid
== table
->nlpid
)
9122 __nft_release_table(net
, table
);
9125 mutex_unlock(&net
->nft
.commit_mutex
);
9130 static struct notifier_block nft_nl_notifier
= {
9131 .notifier_call
= nft_rcv_nl_event
,
9134 static int __net_init
nf_tables_init_net(struct net
*net
)
9136 INIT_LIST_HEAD(&net
->nft
.tables
);
9137 INIT_LIST_HEAD(&net
->nft
.commit_list
);
9138 INIT_LIST_HEAD(&net
->nft
.module_list
);
9139 INIT_LIST_HEAD(&net
->nft
.notify_list
);
9140 mutex_init(&net
->nft
.commit_mutex
);
9141 net
->nft
.base_seq
= 1;
9142 net
->nft
.validate_state
= NFT_VALIDATE_SKIP
;
9147 static void __net_exit
nf_tables_pre_exit_net(struct net
*net
)
9149 __nft_release_hooks(net
);
9152 static void __net_exit
nf_tables_exit_net(struct net
*net
)
9154 mutex_lock(&net
->nft
.commit_mutex
);
9155 if (!list_empty(&net
->nft
.commit_list
))
9156 __nf_tables_abort(net
, NFNL_ABORT_NONE
);
9157 __nft_release_tables(net
);
9158 mutex_unlock(&net
->nft
.commit_mutex
);
9159 WARN_ON_ONCE(!list_empty(&net
->nft
.tables
));
9160 WARN_ON_ONCE(!list_empty(&net
->nft
.module_list
));
9161 WARN_ON_ONCE(!list_empty(&net
->nft
.notify_list
));
9164 static struct pernet_operations nf_tables_net_ops
= {
9165 .init
= nf_tables_init_net
,
9166 .pre_exit
= nf_tables_pre_exit_net
,
9167 .exit
= nf_tables_exit_net
,
9170 static int __init
nf_tables_module_init(void)
9174 spin_lock_init(&nf_tables_destroy_list_lock
);
9175 err
= register_pernet_subsys(&nf_tables_net_ops
);
9179 err
= nft_chain_filter_init();
9181 goto err_chain_filter
;
9183 err
= nf_tables_core_module_init();
9185 goto err_core_module
;
9187 err
= register_netdevice_notifier(&nf_tables_flowtable_notifier
);
9189 goto err_netdev_notifier
;
9191 err
= rhltable_init(&nft_objname_ht
, &nft_objname_ht_params
);
9193 goto err_rht_objname
;
9195 err
= nft_offload_init();
9199 err
= netlink_register_notifier(&nft_nl_notifier
);
9201 goto err_netlink_notifier
;
9204 err
= nfnetlink_subsys_register(&nf_tables_subsys
);
9206 goto err_nfnl_subsys
;
9208 nft_chain_route_init();
9213 netlink_unregister_notifier(&nft_nl_notifier
);
9214 err_netlink_notifier
:
9217 rhltable_destroy(&nft_objname_ht
);
9219 unregister_netdevice_notifier(&nf_tables_flowtable_notifier
);
9220 err_netdev_notifier
:
9221 nf_tables_core_module_exit();
9223 nft_chain_filter_fini();
9225 unregister_pernet_subsys(&nf_tables_net_ops
);
9229 static void __exit
nf_tables_module_exit(void)
9231 nfnetlink_subsys_unregister(&nf_tables_subsys
);
9232 netlink_unregister_notifier(&nft_nl_notifier
);
9234 unregister_netdevice_notifier(&nf_tables_flowtable_notifier
);
9235 nft_chain_filter_fini();
9236 nft_chain_route_fini();
9237 unregister_pernet_subsys(&nf_tables_net_ops
);
9238 cancel_work_sync(&trans_destroy_work
);
9240 rhltable_destroy(&nft_objname_ht
);
9241 nf_tables_core_module_exit();
9244 module_init(nf_tables_module_init
);
9245 module_exit(nf_tables_module_exit
);
9247 MODULE_LICENSE("GPL");
9248 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
9249 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES
);