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>
git-mirror · Oct 20, 2009 · d19742f · d19742f
1 parent ad959e7
commit d19742f
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git 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
@@ -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;