1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_NF_TABLES_CORE_H
3 #define _NET_NF_TABLES_CORE_H
4
5 extern struct nft_expr_type nft_imm_type;
6 extern struct nft_expr_type nft_cmp_type;
7 extern struct nft_expr_type nft_lookup_type;
8 extern struct nft_expr_type nft_bitwise_type;
9 extern struct nft_expr_type nft_byteorder_type;
10 extern struct nft_expr_type nft_payload_type;
11 extern struct nft_expr_type nft_dynset_type;
12 extern struct nft_expr_type nft_range_type;
13
14 int nf_tables_core_module_init(void);
15 void nf_tables_core_module_exit(void);
16
17 struct nft_cmp_fast_expr {
18 u32 data;
19 enum nft_registers sreg:8;
20 u8 len;
21 };
22
23 /* Calculate the mask for the nft_cmp_fast expression. On big endian the
24 * mask needs to include the *upper* bytes when interpreting that data as
25 * something smaller than the full u32, therefore a cpu_to_le32 is done.
26 */
27 static inline u32 nft_cmp_fast_mask(unsigned int len)
28 {
29 return cpu_to_le32(~0U >> (FIELD_SIZEOF(struct nft_cmp_fast_expr,
30 data) * BITS_PER_BYTE - len));
31 }
32
33 extern const struct nft_expr_ops nft_cmp_fast_ops;
34
35 struct nft_payload {
36 enum nft_payload_bases base:8;
37 u8 offset;
38 u8 len;
39 enum nft_registers dreg:8;
40 };
41
42 struct nft_payload_set {
43 enum nft_payload_bases base:8;
44 u8 offset;
45 u8 len;
46 enum nft_registers sreg:8;
47 u8 csum_type;
48 u8 csum_offset;
49 u8 csum_flags;
50 };
51
52 extern const struct nft_expr_ops nft_payload_fast_ops;
53
54 extern struct static_key_false nft_counters_enabled;
55 extern struct static_key_false nft_trace_enabled;
56
57 #endif /* _NET_NF_TABLES_CORE_H */
58
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