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Commit afc5be30 authored by Ana Rey's avatar Ana Rey Committed by Pablo Neira Ayuso
Browse files

netfilter: nft_meta: Add cpu attribute support 



Add cpu support to meta expresion.

This allows you to match packets with cpu number.

Signed-off-by: default avatarAna Rey <anarey@gmail.com>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent e2a093ff

include/uapi/linux/netfilter/nf_tables.h

+2 −0
Original line number Diff line number Diff line
@@ -572,6 +572,7 @@ enum nft_exthdr_attributes { 
 * @NFT_META_BRI_IIFNAME: packet input bridge interface name

 * @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()

 */

enum nft_meta_keys {

	NFT_META_LEN,
@@ -594,6 +595,7 @@ enum nft_meta_keys { 
	NFT_META_BRI_IIFNAME,

	NFT_META_BRI_OIFNAME,

	NFT_META_PKTTYPE,

	NFT_META_CPU,

};



/**

net/netfilter/nft_meta.c

+5 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/in.h>

#include <linux/ip.h>

#include <linux/ipv6.h>

#include <linux/smp.h>

#include <net/dst.h>

#include <net/sock.h>

#include <net/tcp_states.h> /* for TCP_TIME_WAIT */
@@ -151,6 +152,9 @@ void nft_meta_get_eval(const struct nft_expr *expr, 
			goto err;

		}

		break;

	case NFT_META_CPU:

		dest->data[0] = smp_processor_id();

		break;

	default:

		WARN_ON(1);

		goto err;
@@ -223,6 +227,7 @@ int nft_meta_get_init(const struct nft_ctx *ctx, 
	case NFT_META_SECMARK:

#endif

	case NFT_META_PKTTYPE:

	case NFT_META_CPU:

		break;

	default:

		return -EOPNOTSUPP;