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authorBen Greear <greearb@candelatech.com>2012-02-11 15:39:14 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2012-02-24 01:19:59 -0800
commit36eabda3d094dae30a74350c6289c163349b744d (patch)
tree9fc370acb4cf09424b913ff8d5a8a80cd6b21d56 /Documentation
parent7c3a95a15ad2a5278498a72df0463131048926a3 (diff)
net: Support RXFCS feature flag.
When set on hardware that supports the feature, this causes the Ethernet FCS to be appended to the end of the skb. Useful for sniffing packets. Signed-off-by: Ben Greear <greearb@candelatech.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/networking/netdev-features.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/networking/netdev-features.txt b/Documentation/networking/netdev-features.txt
index 4b1c0dcef84c..7d2781230d30 100644
--- a/Documentation/networking/netdev-features.txt
+++ b/Documentation/networking/netdev-features.txt
@@ -152,3 +152,9 @@ NETIF_F_VLAN_CHALLENGED should be set for devices which can't cope with VLAN
headers. Some drivers set this because the cards can't handle the bigger MTU.
[FIXME: Those cases could be fixed in VLAN code by allowing only reduced-MTU
VLANs. This may be not useful, though.]
+
+* rx-fcs
+
+This requests that the NIC append the Ethernet Frame Checksum (FCS)
+to the end of the skb data. This allows sniffers and other tools to
+read the CRC recorded by the NIC on receipt of the packet.