From d19742fb1c68e6db83b76e06dea5a374c99e104f Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 20 Oct 2009 01:06:22 -0700
Subject: [PATCH] filter: Add SKF_AD_QUEUE instruction
It can help being able to filter packets on their queue_mapping.
If filter performance is not good, we could add a "numqueue" field
in struct packet_type, so that netif_nit_deliver() and other functions
can directly ignore packets with not expected queue number.
Lets experiment this simple filter extension first.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/filter.h | 3 ++-
net/core/filter.c | 3 +++
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 909193e25395..bb3b4352978a 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -124,7 +124,8 @@ struct sock_fprog /* Required for SO_ATTACH_FILTER. */
#define SKF_AD_NLATTR 12
#define SKF_AD_NLATTR_NEST 16
#define SKF_AD_MARK 20
-#define SKF_AD_MAX 24
+#define SKF_AD_QUEUE 24
+#define SKF_AD_MAX 28
#define SKF_NET_OFF (-0x100000)
#define SKF_LL_OFF (-0x200000)
diff --git a/net/core/filter.c b/net/core/filter.c
index e3987e1d4839..08db7b9143a3 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -306,6 +306,9 @@ unsigned int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int
case SKF_AD_MARK:
A = skb->mark;
continue;
+ case SKF_AD_QUEUE:
+ A = skb->queue_mapping;
+ continue;
case SKF_AD_NLATTR: {
struct nlattr *nla;
--
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