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| author | Ben Greear <greearb@candelatech.com> | 2011-06-01 06:49:10 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-06-01 21:18:03 -0700 |
| commit | a3bcc23e890a6d49d6763d9eb073d711de2e0469 (patch) | |
| tree | c4156e932f081dc14a514d5ab23cd43e590029cd /include/linux | |
| parent | 41be5a4a3668810bf3687a76c2b017bd437039e0 (diff) | |
| download | linux-stable-a3bcc23e890a6d49d6763d9eb073d711de2e0469.tar.gz linux-stable-a3bcc23e890a6d49d6763d9eb073d711de2e0469.tar.bz2 linux-stable-a3bcc23e890a6d49d6763d9eb073d711de2e0469.zip | |
af-packet: Add flag to distinguish VID 0 from no-vlan.
Currently, user-space cannot determine if a 0 tcp_vlan_tci
means there is no VLAN tag or the VLAN ID was zero.
Add flag to make this explicit. User-space can check for
TP_STATUS_VLAN_VALID || tp_vlan_tci > 0, which will be backwards
compatible. Older could would have just checked for tp_vlan_tci,
so it will work no worse than before.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/if_packet.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/if_packet.h b/include/linux/if_packet.h index 72bfa5a034dd..6d66ce1791a9 100644 --- a/include/linux/if_packet.h +++ b/include/linux/if_packet.h @@ -70,6 +70,7 @@ struct tpacket_auxdata { #define TP_STATUS_COPY 0x2 #define TP_STATUS_LOSING 0x4 #define TP_STATUS_CSUMNOTREADY 0x8 +#define TP_STATUS_VLAN_VALID 0x10 /* auxdata has valid tp_vlan_tci */ /* Tx ring - header status */ #define TP_STATUS_AVAILABLE 0x0 |