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
8 extern struct nft_expr_type nft_imm_type;
9 extern struct nft_expr_type nft_cmp_type;
10 extern struct nft_expr_type nft_lookup_type;
11 extern struct nft_expr_type nft_bitwise_type;
12 extern struct nft_expr_type nft_byteorder_type;
13 extern struct nft_expr_type nft_payload_type;
14 extern struct nft_expr_type nft_dynset_type;
15 extern struct nft_expr_type nft_range_type;
16 extern struct nft_expr_type nft_meta_type;
17 extern struct nft_expr_type nft_rt_type;
18 extern struct nft_expr_type nft_exthdr_type;
19 extern struct nft_expr_type nft_last_type;
20
21 #ifdef CONFIG_NETWORK_SECMARK
22 extern struct nft_object_type nft_secmark_obj_type;
23 #endif
24
25 int nf_tables_core_module_init(void);
26 void nf_tables_core_module_exit(void);
27
28 struct nft_bitwise_fast_expr {
29 u32 mask;
30 u32 xor;
31 u8 sreg;
32 u8 dreg;
33 };
34
35 struct nft_cmp_fast_expr {
36 u32 data;
37 u32 mask;
38 u8 sreg;
39 u8 len;
40 bool inv;
41 };
42
43 struct nft_immediate_expr {
44 struct nft_data data;
45 u8 dreg;
46 u8 dlen;
47 };
48
49 /* Calculate the mask for the nft_cmp_fast expression. On big endian the
50 * mask needs to include the *upper* bytes when interpreting that data as
51 * something smaller than the full u32, therefore a cpu_to_le32 is done.
52 */
nft_cmp_fast_mask(unsigned int len)53 static inline u32 nft_cmp_fast_mask(unsigned int len)
54 {
55 return cpu_to_le32(~0U >> (sizeof_field(struct nft_cmp_fast_expr,
56 data) * BITS_PER_BYTE - len));
57 }
58
59 extern const struct nft_expr_ops nft_cmp_fast_ops;
60
61 struct nft_payload {
62 enum nft_payload_bases base:8;
63 u8 offset;
64 u8 len;
65 u8 dreg;
66 };
67
68 struct nft_payload_set {
69 enum nft_payload_bases base:8;
70 u8 offset;
71 u8 len;
72 u8 sreg;
73 u8 csum_type;
74 u8 csum_offset;
75 u8 csum_flags;
76 };
77
78 extern const struct nft_expr_ops nft_payload_fast_ops;
79
80 extern const struct nft_expr_ops nft_bitwise_fast_ops;
81
82 extern struct static_key_false nft_counters_enabled;
83 extern struct static_key_false nft_trace_enabled;
84
85 extern const struct nft_set_type nft_set_rhash_type;
86 extern const struct nft_set_type nft_set_hash_type;
87 extern const struct nft_set_type nft_set_hash_fast_type;
88 extern const struct nft_set_type nft_set_rbtree_type;
89 extern const struct nft_set_type nft_set_bitmap_type;
90 extern const struct nft_set_type nft_set_pipapo_type;
91 extern const struct nft_set_type nft_set_pipapo_avx2_type;
92
93 #ifdef CONFIG_RETPOLINE
94 bool nft_rhash_lookup(const struct net *net, const struct nft_set *set,
95 const u32 *key, const struct nft_set_ext **ext);
96 bool nft_rbtree_lookup(const struct net *net, const struct nft_set *set,
97 const u32 *key, const struct nft_set_ext **ext);
98 bool nft_bitmap_lookup(const struct net *net, const struct nft_set *set,
99 const u32 *key, const struct nft_set_ext **ext);
100 bool nft_hash_lookup_fast(const struct net *net,
101 const struct nft_set *set,
102 const u32 *key, const struct nft_set_ext **ext);
103 bool nft_hash_lookup(const struct net *net, const struct nft_set *set,
104 const u32 *key, const struct nft_set_ext **ext);
105 bool nft_set_do_lookup(const struct net *net, const struct nft_set *set,
106 const u32 *key, const struct nft_set_ext **ext);
107 #else
108 static inline bool
nft_set_do_lookup(const struct net * net,const struct nft_set * set,const u32 * key,const struct nft_set_ext ** ext)109 nft_set_do_lookup(const struct net *net, const struct nft_set *set,
110 const u32 *key, const struct nft_set_ext **ext)
111 {
112 return set->ops->lookup(net, set, key, ext);
113 }
114 #endif
115
116 /* called from nft_pipapo_avx2.c */
117 bool nft_pipapo_lookup(const struct net *net, const struct nft_set *set,
118 const u32 *key, const struct nft_set_ext **ext);
119 /* called from nft_set_pipapo.c */
120 bool nft_pipapo_avx2_lookup(const struct net *net, const struct nft_set *set,
121 const u32 *key, const struct nft_set_ext **ext);
122
123 struct nft_expr;
124 struct nft_regs;
125 struct nft_pktinfo;
126 void nft_meta_get_eval(const struct nft_expr *expr,
127 struct nft_regs *regs, const struct nft_pktinfo *pkt);
128 void nft_cmp_eval(const struct nft_expr *expr,
129 struct nft_regs *regs, const struct nft_pktinfo *pkt);
130 void nft_lookup_eval(const struct nft_expr *expr,
131 struct nft_regs *regs, const struct nft_pktinfo *pkt);
132 void nft_payload_eval(const struct nft_expr *expr,
133 struct nft_regs *regs, const struct nft_pktinfo *pkt);
134 void nft_immediate_eval(const struct nft_expr *expr,
135 struct nft_regs *regs, const struct nft_pktinfo *pkt);
136 void nft_bitwise_eval(const struct nft_expr *expr,
137 struct nft_regs *regs, const struct nft_pktinfo *pkt);
138 void nft_range_eval(const struct nft_expr *expr,
139 struct nft_regs *regs, const struct nft_pktinfo *pkt);
140 void nft_byteorder_eval(const struct nft_expr *expr,
141 struct nft_regs *regs, const struct nft_pktinfo *pkt);
142 void nft_dynset_eval(const struct nft_expr *expr,
143 struct nft_regs *regs, const struct nft_pktinfo *pkt);
144 void nft_rt_get_eval(const struct nft_expr *expr,
145 struct nft_regs *regs, const struct nft_pktinfo *pkt);
146 #endif /* _NET_NF_TABLES_CORE_H */
147
