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netfilter: nf_tables: variable sized set element keys / data

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This patch changes sets to support variable sized set element keys / data
up to 64 bytes each by using variable sized set extensions. This allows
to use concatenations with bigger data items suchs as IPv6 addresses.

As a side effect, small keys/data now don't require the full 16 bytes
of struct nft_data anymore but just the space they need.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Patrick McHardy
2015-04-11 02:27:39 +01:00
committed by Pablo Neira Ayuso
parent d0a11fc3dc
commit 7d7402642e
5 changed files with 23 additions and 19 deletions
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5
include/net/netfilter/nf_tables.h
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@@ -158,7 +158,10 @@ struct nft_userdata {
* @priv: element private data and extensions
*/
struct nft_set_elem {
struct nft_data key;
union {
u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)];
struct nft_data val;
} key;
void *priv;
};