Add cpu support to meta expresion.
This allows you to match packets with cpu number.
Signed-off-by: Ana Rey <anarey@xxxxxxxxx>
---
include/uapi/linux/netfilter/nf_tables.h | 2 ++
net/netfilter/nft_meta.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 72ad208..67218f3 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -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
+ * @NFT_META_CPU: Packet cpu
*/
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,
};
/**
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index dbf7fe1..34a587e 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -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 */
@@ -150,6 +151,9 @@ 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;
@@ -222,6 +226,7 @@ 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;
--
1.7.10.4
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