[Bug 193673] New: [ixgbe] flowid / rss field should only be set if the packettype field says it has a flowid

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193673

            Bug ID: 193673
           Summary: [ixgbe] flowid / rss field should only be set if the
                    packettype field says it has a flowid
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: adrian at freebsd.org

When RSS is enabled, the receive path assigns the flowid and flowtype from the
RX descriptor.

However, it doesn't check to see if the flowid is actually an RSS flowid or
whether the field means something else.

It should check a couple of things:

* RSS type should indicate a valid type (eg 0xf == flow director filter match);
* packet type should say it's an L3 packet, not an L2 packet.

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