igb: Add anti-spoofing feature documentation
Add the documentation for the anti-spoofing feature in the HW.
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/Documentation/networking/igb.txt b/Documentation/networking/igb.txt
index 98953c0..9a2a037 100644
--- a/Documentation/networking/igb.txt
+++ b/Documentation/networking/igb.txt
@@ -93,6 +93,19 @@
REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not
found, the system will fallback to MSI or to Legacy interrupts.
+ MAC and VLAN anti-spoofing feature
+ ----------------------------------
+ When a malicious driver attempts to send a spoofed packet, it is dropped by
+ the hardware and not transmitted. An interrupt is sent to the PF driver
+ notifying it of the spoof attempt.
+
+ When a spoofed packet is detected the PF driver will send the following
+ message to the system log (displayed by the "dmesg" command):
+
+ Spoof event(s) detected on VF(n)
+
+ Where n=the VF that attempted to do the spoofing.
+
Support
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