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authorPablo Neira Ayuso <pablo@netfilter.org>2017-01-18 18:30:13 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2017-02-08 14:16:21 +0100
commit665153ff575207f3a092cfcea3c51238612a7b58 (patch)
tree258b7402cf9fa6e533dfb850983a17a3beb425bd /arch
parent0b5a78749260560f41e3b7c1f60f2c7dd9aff4f0 (diff)
netfilter: nf_tables: add bitmap set type
This patch adds a new bitmap set type. This bitmap uses two bits to represent one element. These two bits determine the element state in the current and the future generation that fits into the nf_tables commit protocol. When dumping elements back to userspace, the two bits are expanded into a struct nft_set_ext object. If no NFTA_SET_DESC_SIZE is specified, the existing automatic set backend selection prefers bitmap over hash in case of keys whose size is <= 16 bit. If the set size is know, the bitmap set type is selected if with 16 bit kets and more than 390 elements in the set, otherwise the hash table set implementation is used. For 8 bit keys, the bitmap consumes 66 bytes. For 16 bit keys, the bitmap takes 16388 bytes. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions