Re: Does macvtap support host to guest communication?

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, Apr 19, 2011 at 02:14:25PM +0200, Arnd Bergmann wrote:
> On Monday 18 April 2011, Asias He wrote:
> > > 
> > > If you want a regular device to be able to send to a macvlan
> > > port, that would require at least these changes:
> > > 
> > > * Add an option to put a plain device into macvlan-bridge mode
> > > * Add support for that option into iproute2
> > > * Add a hook into dev_queue_xmit() to check for macvlan ports
> > 
> > Cool! Arnd, mind to add this feature to macvtap?
> 
> No, not after I just explained why I haven't done it before
> and why it's so controversial.
> 
> Also, I have moved on to other projects and am no longer doing
> active development of the macvtap driver. I'd be happy to
> pass on the ownership to someone else and help him or her extend
> it.
> 
> 	Arnd

There's overlap between macvtap and some
ongoing work on vhost-net.  In particular there are efforts to add zero
copy and multiqueue support.  So if you like, apply something like the
below:

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index 649600c..28861a4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4034,6 +4034,13 @@ S:	Maintained
 F:	drivers/net/macvlan.c
 F:	include/linux/if_macvlan.h
 
+MACVTAP DRIVER
+M:	Michael S. Tsirkin <mst@redhat.com>
+M:	Arnd Bergmann <arnd@arndb.de>
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	drivers/net/macvtap.c
+
 MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7
 M:	Michael Kerrisk <mtk.manpages@gmail.com>
 W:	http://www.kernel.org/doc/man-pages