On Thu, 2014-11-13 at 08:28 +0000, Hiroshi Shimamoto wrote: > From: Hiroshi Shimamoto <h-shimam...@ct.jp.nec.com> > > Disable hardware VLAN filtering if netdev->features VLAN flag is dropped. > > In SR-IOV case, there is a use case which needs to disable VLAN filter. > For example, we need to make a network function with VF in virtualized > environment. That network function may be a software switch, a router > or etc. It means that that network function will be an end point which > terminates many VLANs. > > In the current implementation, VLAN filtering always be turned on and > VF can receive only 63 VLANs. It means that only 63 VLANs can be used > and it's not enough at all for building a virtual router. > > With this patch, if the user turns VLAN filtering off on the host, VF > can receive every VLAN packet. > The behavior is changed only if VLAN filtering is turned off by ethtool. [...]
What happens when VLAN filtering is turned back on and a VF uses too many VLANs? It seems like that should either be prevented (you can't turn it back on) or the driver should log a message saying the VF is now broken. Ben. -- Ben Hutchings Beware of bugs in the above code; I have only proved it correct, not tried it. - Donald Knuth
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