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Commit 3045d760 authored by Ana Rey's avatar Ana Rey Committed by Pablo Neira Ayuso
Browse files

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: default avatarAna Rey <anarey@gmail.com>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent ce24b721

include/uapi/linux/netfilter/nf_tables.h

+4 −0
Original line number Diff line number Diff line
@@ -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,

};



/**

net/netfilter/nft_meta.c

+12 −0
Original line number Diff line number Diff line
@@ -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;