diff options
author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-11-30 16:45:56 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-12-06 15:59:05 -0500 |
commit | da2033c282264bfba4e339b7cb3df62adb5c5fc8 (patch) | |
tree | 8a28a32439f073b5b99d0782ee295cb458e108cb /include | |
parent | 539995d18649023199986424d140f1d620372ce5 (diff) |
filter: add SKF_AD_RXHASH and SKF_AD_CPU
Add SKF_AD_RXHASH and SKF_AD_CPU to filter ancillary mechanism,
to be able to build advanced filters.
This can help spreading packets on several sockets with a fast
selection, after RPS dispatch to N cpus for example, or to catch a
percentage of flows in one queue.
tcpdump -s 500 "cpu = 1" :
[0] ld CPU
[1] jeq #1 jt 2 jf 3
[2] ret #500
[3] ret #0
# take 12.5 % of flows (average)
tcpdump -s 1000 "rxhash & 7 = 2" :
[0] ld RXHASH
[1] and #7
[2] jeq #2 jt 3 jf 4
[3] ret #1000
[4] ret #0
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Rui <wirelesser@gmail.com>
Acked-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/filter.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 447a775878fb..5334adaf4072 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h | |||
@@ -124,7 +124,9 @@ struct sock_fprog { /* Required for SO_ATTACH_FILTER. */ | |||
124 | #define SKF_AD_MARK 20 | 124 | #define SKF_AD_MARK 20 |
125 | #define SKF_AD_QUEUE 24 | 125 | #define SKF_AD_QUEUE 24 |
126 | #define SKF_AD_HATYPE 28 | 126 | #define SKF_AD_HATYPE 28 |
127 | #define SKF_AD_MAX 32 | 127 | #define SKF_AD_RXHASH 32 |
128 | #define SKF_AD_CPU 36 | ||
129 | #define SKF_AD_MAX 40 | ||
128 | #define SKF_NET_OFF (-0x100000) | 130 | #define SKF_NET_OFF (-0x100000) |
129 | #define SKF_LL_OFF (-0x200000) | 131 | #define SKF_LL_OFF (-0x200000) |
130 | 132 | ||