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TOMOYO Linux Cross Reference
Linux/include/net/netfilter/nf_tables_core.h

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

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