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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>
This commit is contained in:
Eric Dumazet 2009-10-20 01:06:22 -07:00 committed by David S. Miller
parent ad959e76f0
commit d19742fb1c
2 changed files with 5 additions and 1 deletions
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3
include/linux/filter.h
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@ -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)

3
net/core/filter.c
View File

@ -306,6 +306,9 @@ load_b:
case SKF_AD_MARK:
A = skb->mark;
continue;
case SKF_AD_QUEUE:
A = skb->queue_mapping;
continue;
case SKF_AD_NLATTR: {
struct nlattr *nla;