netdev - RE: [PATCH v2] ixgbe: make VLAN filter conditional

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Message-ID: <7F861DC0615E0C47A872E6F3C5FCDDBD05E4EC48@BPXM14GP.gisp.nec.co.jp>
Date:	Fri, 6 Mar 2015 06:04:10 +0000
From:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
CC:	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Choi, Sy Jong" <sy.jong.choi@...el.com>,
	Hayato Momma <h-momma@...jp.nec.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"ben@...adent.org.uk" <ben@...adent.org.uk>
Subject: RE: [PATCH v2] ixgbe: make VLAN filter conditional

> From: Hiroshi Shimamoto <h-shimamoto@...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 terminated
> in one NIC.
> 
> With this patch, if the user turns VLAN filtering off on the host, VF
> can receive every VLAN packet.
> 
> This VLAN filtering can be turned on or off when SR-IOV is disabled, if not
> the operation is rejected.

Hi,

any comment about this?
I added a warning message and prevent operation during SR-IOV is enabled.


thanks,
Hiroshi