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netfilter: nft_payload: add optimized payload implementation for small loads

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Add an optimized payload expression implementation for small (up to 4 bytes)
aligned data loads from the linear packet area.

This patch also includes original Patrick McHardy's entitled (nf_tables:
inline nft_payload_fast_eval() into main evaluation loop).

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Patrick McHardy
2013-10-10 11:06:41 +02:00
committed by Pablo Neira Ayuso
parent cb7dbfd039
commit c29b72e025
3 changed files with 81 additions and 28 deletions
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9
include/net/netfilter/nf_tables_core.h
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@ -27,6 +27,15 @@ extern void nft_bitwise_module_exit(void);
extern int nft_byteorder_module_init(void);
extern void nft_byteorder_module_exit(void);
struct nft_payload {
enum nft_payload_bases base:8;
u8 offset;
u8 len;
enum nft_registers dreg:8;
};
extern const struct nft_expr_ops nft_payload_fast_ops;
extern int nft_payload_module_init(void);
extern void nft_payload_module_exit(void);