diff options
| author | Phil Sutter <phil@nwl.cc> | 2020-10-01 18:57:44 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-10-04 21:08:33 +0200 |
| commit | 10fdd6d80e4c21ad48f3860d723f5b3b5965477b (patch) | |
| tree | bfc2834ea3fe446b5bf8c59082afba2e8836b25c /include/net | |
| parent | 5f48846daf3321f8a1f8aa99cd6173e3980b7a29 (diff) | |
| download | linux-10fdd6d80e4c21ad48f3860d723f5b3b5965477b.tar.bz2 | |
netfilter: nf_tables: Implement fast bitwise expression
A typical use of bitwise expression is to mask out parts of an IP
address when matching on the network part only. Optimize for this common
use with a fast variant for NFT_BITWISE_BOOL-type expressions operating
on 32bit-sized values.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netfilter/nf_tables_core.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_tables_core.h b/include/net/netfilter/nf_tables_core.h index df2d91c814cb..8657e6815b07 100644 --- a/include/net/netfilter/nf_tables_core.h +++ b/include/net/netfilter/nf_tables_core.h @@ -23,6 +23,13 @@ extern struct nft_object_type nft_secmark_obj_type; int nf_tables_core_module_init(void); void nf_tables_core_module_exit(void); +struct nft_bitwise_fast_expr { + u32 mask; + u32 xor; + enum nft_registers sreg:8; + enum nft_registers dreg:8; +}; + struct nft_cmp_fast_expr { u32 data; u32 mask; @@ -68,6 +75,8 @@ struct nft_payload_set { extern const struct nft_expr_ops nft_payload_fast_ops; +extern const struct nft_expr_ops nft_bitwise_fast_ops; + extern struct static_key_false nft_counters_enabled; extern struct static_key_false nft_trace_enabled; |