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| author | Eric Dumazet | 2012-10-27 04:26:17 +0200 |
|---|---|---|
| committer | David S. Miller | 2012-10-31 19:00:15 +0100 |
| commit | f3335031b9452baebfe49b8b5e55d3fe0c4677d1 (patch) | |
| tree | c73f4d2827d3b58b4866488a35b4b462e52713ba /include/uapi/linux/filter.h | |
| parent | net/cadence: depend on HAS_IOMEM (diff) | |
| download | kernel-qcow2-linux-f3335031b9452baebfe49b8b5e55d3fe0c4677d1.tar.gz kernel-qcow2-linux-f3335031b9452baebfe49b8b5e55d3fe0c4677d1.tar.xz kernel-qcow2-linux-f3335031b9452baebfe49b8b5e55d3fe0c4677d1.zip | |
net: filter: add vlan tag access
BPF filters lack ability to access skb->vlan_tci
This patch adds two new ancillary accessors :
SKF_AD_VLAN_TAG (44) mapped to vlan_tx_tag_get(skb)
SKF_AD_VLAN_TAG_PRESENT (48) mapped to vlan_tx_tag_present(skb)
This allows libpcap/tcpdump to use a kernel filter instead of
having to fallback to accept all packets, then filter them in
user space.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Ani Sinha <ani@aristanetworks.com>
Suggested-by: Daniel Borkmann <danborkmann@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/filter.h')
| -rw-r--r-- | include/uapi/linux/filter.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/uapi/linux/filter.h b/include/uapi/linux/filter.h index 3d7922433aba..9cfde6941099 100644 --- a/include/uapi/linux/filter.h +++ b/include/uapi/linux/filter.h @@ -127,7 +127,9 @@ struct sock_fprog { /* Required for SO_ATTACH_FILTER. */ #define SKF_AD_RXHASH 32 #define SKF_AD_CPU 36 #define SKF_AD_ALU_XOR_X 40 -#define SKF_AD_MAX 44 +#define SKF_AD_VLAN_TAG 44 +#define SKF_AD_VLAN_TAG_PRESENT 48 +#define SKF_AD_MAX 52 #define SKF_NET_OFF (-0x100000) #define SKF_LL_OFF (-0x200000) |