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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _NET_NF_TABLES_CORE_H
3#define _NET_NF_TABLES_CORE_H
4
5#include <net/netfilter/nf_tables.h>
6#include <linux/indirect_call_wrapper.h>
7
8extern struct nft_expr_type nft_imm_type;
9extern struct nft_expr_type nft_cmp_type;
10extern struct nft_expr_type nft_counter_type;
11extern struct nft_expr_type nft_lookup_type;
12extern struct nft_expr_type nft_bitwise_type;
13extern struct nft_expr_type nft_byteorder_type;
14extern struct nft_expr_type nft_payload_type;
15extern struct nft_expr_type nft_dynset_type;
16extern struct nft_expr_type nft_range_type;
17extern struct nft_expr_type nft_meta_type;
18extern struct nft_expr_type nft_rt_type;
19extern struct nft_expr_type nft_exthdr_type;
20extern struct nft_expr_type nft_last_type;
21extern struct nft_expr_type nft_objref_type;
22extern struct nft_expr_type nft_inner_type;
23
24#ifdef CONFIG_NETWORK_SECMARK
25extern struct nft_object_type nft_secmark_obj_type;
26#endif
27extern struct nft_object_type nft_counter_obj_type;
28
29int nf_tables_core_module_init(void);
30void nf_tables_core_module_exit(void);
31
32struct nft_bitwise_fast_expr {
33 u32 mask;
34 u32 xor;
35 u8 sreg;
36 u8 dreg;
37};
38
39struct nft_cmp_fast_expr {
40 u32 data;
41 u32 mask;
42 u8 sreg;
43 u8 len;
44 bool inv;
45};
46
47struct nft_cmp16_fast_expr {
48 struct nft_data data;
49 struct nft_data mask;
50 u8 sreg;
51 u8 len;
52 bool inv;
53};
54
55struct nft_immediate_expr {
56 struct nft_data data;
57 u8 dreg;
58 u8 dlen;
59};
60
61extern const struct nft_expr_ops nft_cmp_fast_ops;
62extern const struct nft_expr_ops nft_cmp16_fast_ops;
63
64struct nft_ct {
65 enum nft_ct_keys key:8;
66 enum ip_conntrack_dir dir:8;
67 u8 len;
68 union {
69 u8 dreg;
70 u8 sreg;
71 };
72};
73
74struct nft_payload {
75 enum nft_payload_bases base:8;
76 u8 offset;
77 u8 len;
78 u8 dreg;
79};
80
81extern const struct nft_expr_ops nft_payload_fast_ops;
82
83extern const struct nft_expr_ops nft_bitwise_fast_ops;
84
85extern struct static_key_false nft_counters_enabled;
86extern struct static_key_false nft_trace_enabled;
87
88extern const struct nft_set_type nft_set_rhash_type;
89extern const struct nft_set_type nft_set_hash_type;
90extern const struct nft_set_type nft_set_hash_fast_type;
91extern const struct nft_set_type nft_set_rbtree_type;
92extern const struct nft_set_type nft_set_bitmap_type;
93extern const struct nft_set_type nft_set_pipapo_type;
94extern const struct nft_set_type nft_set_pipapo_avx2_type;
95
96#ifdef CONFIG_MITIGATION_RETPOLINE
97bool nft_rhash_lookup(const struct net *net, const struct nft_set *set,
98 const u32 *key, const struct nft_set_ext **ext);
99bool nft_rbtree_lookup(const struct net *net, const struct nft_set *set,
100 const u32 *key, const struct nft_set_ext **ext);
101bool nft_bitmap_lookup(const struct net *net, const struct nft_set *set,
102 const u32 *key, const struct nft_set_ext **ext);
103bool nft_hash_lookup_fast(const struct net *net,
104 const struct nft_set *set,
105 const u32 *key, const struct nft_set_ext **ext);
106bool nft_hash_lookup(const struct net *net, const struct nft_set *set,
107 const u32 *key, const struct nft_set_ext **ext);
108bool nft_set_do_lookup(const struct net *net, const struct nft_set *set,
109 const u32 *key, const struct nft_set_ext **ext);
110#else
111static inline bool
112nft_set_do_lookup(const struct net *net, const struct nft_set *set,
113 const u32 *key, const struct nft_set_ext **ext)
114{
115 return set->ops->lookup(net, set, key, ext);
116}
117#endif
118
119/* called from nft_pipapo_avx2.c */
120bool nft_pipapo_lookup(const struct net *net, const struct nft_set *set,
121 const u32 *key, const struct nft_set_ext **ext);
122/* called from nft_set_pipapo.c */
123bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set,
124 const u32 *key, const struct nft_set_ext **ext);
125
126void nft_counter_init_seqcount(void);
127
128struct nft_expr;
129struct nft_regs;
130struct nft_pktinfo;
131void nft_meta_get_eval(const struct nft_expr *expr,
132 struct nft_regs *regs, const struct nft_pktinfo *pkt);
133void nft_cmp_eval(const struct nft_expr *expr,
134 struct nft_regs *regs, const struct nft_pktinfo *pkt);
135void nft_lookup_eval(const struct nft_expr *expr,
136 struct nft_regs *regs, const struct nft_pktinfo *pkt);
137void nft_payload_eval(const struct nft_expr *expr,
138 struct nft_regs *regs, const struct nft_pktinfo *pkt);
139void nft_immediate_eval(const struct nft_expr *expr,
140 struct nft_regs *regs, const struct nft_pktinfo *pkt);
141void nft_bitwise_eval(const struct nft_expr *expr,
142 struct nft_regs *regs, const struct nft_pktinfo *pkt);
143void nft_range_eval(const struct nft_expr *expr,
144 struct nft_regs *regs, const struct nft_pktinfo *pkt);
145void nft_byteorder_eval(const struct nft_expr *expr,
146 struct nft_regs *regs, const struct nft_pktinfo *pkt);
147void nft_dynset_eval(const struct nft_expr *expr,
148 struct nft_regs *regs, const struct nft_pktinfo *pkt);
149void nft_rt_get_eval(const struct nft_expr *expr,
150 struct nft_regs *regs, const struct nft_pktinfo *pkt);
151void nft_counter_eval(const struct nft_expr *expr, struct nft_regs *regs,
152 const struct nft_pktinfo *pkt);
153void nft_ct_get_fast_eval(const struct nft_expr *expr,
154 struct nft_regs *regs, const struct nft_pktinfo *pkt);
155
156enum {
157 NFT_PAYLOAD_CTX_INNER_TUN = (1 << 0),
158 NFT_PAYLOAD_CTX_INNER_LL = (1 << 1),
159 NFT_PAYLOAD_CTX_INNER_NH = (1 << 2),
160 NFT_PAYLOAD_CTX_INNER_TH = (1 << 3),
161};
162
163struct nft_inner_tun_ctx {
164 u16 type;
165 u16 inner_tunoff;
166 u16 inner_lloff;
167 u16 inner_nhoff;
168 u16 inner_thoff;
169 __be16 llproto;
170 u8 l4proto;
171 u8 flags;
172};
173
174int nft_payload_inner_offset(const struct nft_pktinfo *pkt);
175void nft_payload_inner_eval(const struct nft_expr *expr, struct nft_regs *regs,
176 const struct nft_pktinfo *pkt,
177 struct nft_inner_tun_ctx *ctx);
178
179void nft_objref_eval(const struct nft_expr *expr, struct nft_regs *regs,
180 const struct nft_pktinfo *pkt);
181void nft_objref_map_eval(const struct nft_expr *expr, struct nft_regs *regs,
182 const struct nft_pktinfo *pkt);
183#endif /* _NET_NF_TABLES_CORE_H */
184

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source code of linux/include/net/netfilter/nf_tables_core.h