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netfilter: nf_tables: add devgroup support in meta expresion 

Add devgroup support to let us match device group of a packets incoming
or outgoing interface.

Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Ana Rey 2014-09-02 20:36:14 +02:00 committed by Pablo Neira Ayuso
parent ce24b7217b
commit 3045d76070
2 changed files with 16 additions and 0 deletions
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4
include/uapi/linux/netfilter/nf_tables.h
View File

@ -573,6 +573,8 @@ enum nft_exthdr_attributes {
* @NFT_META_BRI_OIFNAME: packet output bridge interface name
* @NFT_META_PKTTYPE: packet type (skb->pkt_type), special handling for loopback
* @NFT_META_CPU: cpu id through smp_processor_id()
* @NFT_META_IIFGROUP: packet input interface group
* @NFT_META_OIFGROUP: packet output interface group
*/
enum nft_meta_keys {
NFT_META_LEN,
@ -596,6 +598,8 @@ enum nft_meta_keys {
NFT_META_BRI_OIFNAME,
NFT_META_PKTTYPE,
NFT_META_CPU,
NFT_META_IIFGROUP,
NFT_META_OIFGROUP,
};
/**

12
net/netfilter/nft_meta.c
View File

@ -155,6 +155,16 @@ void nft_meta_get_eval(const struct nft_expr *expr,
case NFT_META_CPU:
dest->data[0] = smp_processor_id();
break;
case NFT_META_IIFGROUP:
if (in == NULL)
goto err;
dest->data[0] = in->group;
break;
case NFT_META_OIFGROUP:
if (out == NULL)
goto err;
dest->data[0] = out->group;
break;
default:
WARN_ON(1);
goto err;
@ -228,6 +238,8 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
#endif
case NFT_META_PKTTYPE:
case NFT_META_CPU:
case NFT_META_IIFGROUP:
case NFT_META_OIFGROUP:
break;
default:
return -EOPNOTSUPP;